1.give the right form of verb

1.In the summer,I usually (go)....GO.....................to park with my friends and in the spring,we (have)...............HAVE.....Tet holiday,I(be)........AM...........happy because I always (visit)............VISIT...........my granparents.

2................DOES........your father(go)...........GO........to work by bus

3.How............DOES........your sister (go)............GO....to school

4.what time ........DO............they (get up)...........GET UP.........

5.What...........DO.......they (do)..........DO........in the winter

6.Today,we (have)......HAVE............English

7.Her favourite subject (be).......IS..........English

8.Now,my brother(eat).......IS EATTING............a banana

9.Look!Aman(call)..............IS CALLING.......you

10.Keep silent!I(listen)........AM LISTENING................to radio

11...............ARE............you (play)............PLAYING.........badminton now

12.Everyday,my father (get up).........GETS UP.......at 5.00 a.m but today,he (get up).....IS GETTING UP...............at 6.00 a.m

13.Every morning, I (watch)....WATCH.............TV at 10.00 but today,I (listen)..........AM LISTENING.....to music at 10.00

14.Everyday,I(go) ........GO......to school by bike but today,I go to school by moto

15.Every morning,my father (have)..HAS...............a cup of coffee but today he (drink)......IS HAVING...........milk

16.At the moment, I(read).......AM READING.............a book and my brother (watch).........IS WATCHING........TV

17.Hoa (live)............LIVES...........in Hanoi,Ha (live).....LIVES.................in HCM City

18.Hung and Lan (play).........PLAY.................badminton every day

19.They usually (get up).....GET UP............at 6.00 a.m in the morning

20.Ha never(go)...........GOES.........fishing in the winter but she always (do)......DOES.............in the summer

21.My teacher(tell)........TELLS...........Hoa about Math

22.There(be).........IS...........animal in the circus

23.............DOES...........He (watch)...........WATCH............TV at 7.00 every morning

24.What........DOES...........she (do)...........DO...........at 7.00a.m

25.How old........IS........she (be)

26.How........IS..........she (be)

27.My children (go)........GO.......to school by bike

28.We (go)......GO......to supermaket to(buy).........BUY.........some food

29.Mr Hung (go).....GOES.........to Hanoi every month

30.Ha (like) ............LIKES......coffee ,but I(not/like)............DON'T LIKE......it

31.She (like)....LIKES..........tea,but she (not/like)...........DOESN'T LIKE..........coffee

32.I (love).....LOVE....catbut I (not/love)..........DON'T LOVE......dog

33.Every day,I (go)........GO...........to school on foot,but today I (go )....AM GOING..........to school

34.Who.....ARE....you.......WAITING.........(wait)for,Vien?I(wait).........AM WAITING....for mr.Lam

35.My sister(get).....GETS........dressed and(brush)............BRUSHES......her teeth

36.Mr Huong(not live).......DOESN'T LIVE..in town.She (live)..........LIVES..a home

37.How........DO.....your children(go)....GO............to school

1.give the right form of verb

1.In the summer,I usually (go).............GO............to park with my friends and in the spring,we (have).......HAVE.............Tet holiday,I(be)........AM...........happy because I always (visit).......VISIT................my granparents.

2..............DOES..........your father(go)........GO...........to work by bus

3.How..............DOES......your sister (go)....GO............to school

4.what time .............DO.......they (get up)........GET UP............

5.What.........DO.........they (do)........DO..........in the winter

6.Today,we (have)........HAVE..........English

7.Her favourite subject (be).....IS............English

8.Now,my brother(eat)..........IS EATING.........a banana

9.Look!Aman(call)..........IS CALLING...........you

10.Keep silent!I(listen)..............AM LISTENING..........to radio

11...........ARE................you (play).........PLAYING...........badminton now

12.Everyday,my father (get up)......GETS UP..........at 5.00 a.m but today,he (get up)........GOT UP............at 6.00 a.m

13.Every morning, I (watch)..........WATCH.......TV at 10.00 but today,I (listen)...LISTENED............to music at 10.00

14.Everyday,I(go) .....GO.........to school by bike but today,I go to school by moto

15.Every morning,my father (have)..........HAS.......a cup of coffee but today he (drink).....DRANK............milk

16.At the moment, I(read).........AM READING...........a book and my brother (watch).....IS WATCHING............TV

17.Hoa (live)..........LIVES.............in Hanoi,Ha (live).........LIVES.............in HCM City

18.Hung and Lan (play)...............PLAY............badminton every day

19.They usually (get up).....GET UP............at 6.00 a.m in the morning

20.Ha never(go).........GOES...........fishing in the winter but she always (do)........DOES...........in the summer

21.My teacher(tell)........IS TELLING............Hoa about Math

22.There(be).........ARE...........animalS in the circus

23...............DOES.........He (watch).......WATCH................TV at 7.00 every morning

24.What........WAS...........she (do).........DOING.............at 7.00a.m

25.How old............IS....she (be)

26.How.............IS.....she (be)

27.My children (go)......GO.........to school by bike

28.We (go)....GO........to supermaket to(buy)....BUY..............some food

29.Mr Hung (go)......GOES........to Hanoi every month

30.Ha (like) ........LIKES..........coffee ,but I(not/like).....DON'T LIKE..............it

31.She (like)......LIKES........tea,but she (not/like)......DOESN'T LIKE..............coffee

32.I (love)....LOVE.....catbut I (not/love)......DON'T LOVE..........dog

33.Every day,I (go)..........GO........to school on foot,but today I (go )........WENT......to school

34.Who....ARE.....you......WAITING..........(wait)for,Vien?I(wait).....AM WAITING........for mr.Lam

35.My sister(get)......GETS.......dressed and(brush)...BRUSHES...............her teeth

36.Mr Huong(not live)....DOESN'T LIVE.....in town.She (live)...LIVES.........a home

37.How.....DO........your children(go)........GO........to school

1.give the right form of verb

1.In the summer,I usually (go)............go.............to park with my friends and in the spring,we (have).........have...........Tet holiday,I(be).........am..........happy because I always (visit).........visit..............my granparents.

2.............Does...........your father(go).........go..........to work by bus

3.How..........does..........your sister (go).......go.........to school

4.what time .........do...........they (get up).........get up...........

5.What.........do.........they (do).........do.........in the winter

6.Today,we (have)..........have........English

7.Her favourite subject (be).........is........English

8.Now,my brother(eat).........is eating..........a banana

9.Look!Aman(call)............is calling.........you

10.Keep silent!I(listen)..............am listening..........to radio

11...........Are................you (play)..........playing...........badminton now

12.Everyday,my father (get up)........gets up........at 5.00 a.m but today,he (get up)..........is getting up..........at 6.00 a.m

13.Every morning, I (watch).........watch........TV at 10.00 but today,I (listen)........am listening.......to music at 10.00

14.Everyday,I(go) ........go......to school by bike but today,I go to school by moto

15.Every morning,my father (have)........has.........a cup of coffee but today he (drink).........is drinking........milk

16.At the moment, I(read)..........am reading..........a book and my brother (watch).........is watching........TV

17.Hoa (live)............lives...........in Hanoi,Ha (live)............lives..........in HCM City

18.Hung and Lan (play)..............play.............badminton every day

19.They usually (get up).........get up........at 6.00 a.m in the morning

20.Ha never(go)..........goes..........fishing in the winter but she always (do)..........does.........in the summer

21.My teacher(tell)...........tells.........Hoa about Math

22.There(be)..........is..........animal in the circus

23............Does............He (watch).............watch..........TV at 7.00 every morning

24.What...........does........she (do)..........do............at 7.00a.m

25.How old.........is.......she (be)

26.How.........is.........she (be)

27.My children (go)........go.......to school by bike

28.We (go)......go......to supermaket to(buy).......buy...........some food

29.Mr Hung (go)........goes......to Hanoi every month

30.Ha (like) ...........likes.......coffee ,but I(not/like)........don't like...........it

31.She (like).......likes.......tea,but she (not/like)...........doesn't like..........coffee

32.I (love)....love.....catbut I (not/love).........don't love.......dog

33.Every day,I (go)...........go........to school on foot,but today I (go )........am going......to school

34.Who....are.....you........waiting........(wait)for,Vien?I(wait).......am wating......for mr.Lam

35.My sister(get).......gets......dressed and(brush).........brushes.........her teeth

36.Mr Huong(not live)....doesn't live.....in town.She (live)......lives......a home

37.How......do.......your children(go).........go.......to school

Bài tập kết hợp thì hiện tại đơn và thì hiện tại tiếp diễn

1.Where do you(live)live?

I (live)live in Hai Duong town.

2.What is he (do)doing?

He (water)is wateringflower in the garden.

3.What does she(do)do?

She (be)is a teacher.

4.Where are you(be) from?

5.At the moment,my sister(play)is playing volleyball and my brother(play)is playing soccer.

6.It is 9.00,my family(watch)is watching TV.

7.In the summer,I usually(go)go to the park with my friend,and in the spring,we (have)have Tet Holiday;I(be)am happy because I always(visit)visit my granparents.

8.Does your father(go)go to work by bus?

9.How does your father (go)go to school?

10.What time do they (get up)get up?

11.What do they(do)doin the winter?

12.Today,we(have)are having English class.

13.Her favourite subject(be)isEnglish

14.Now ,my brother (like)likes eating bananas

15.Look!Aman(call)is calling you

16.Keep silent!I(listen)am listening to the radio

17Are you(play)playing badminton now?

18.Everyday,my father(get up) gets up at 5.00 a.m,but today,he (get up)is getting upat 6.00a.m

19.Every morning,I(watch)watch TV at 10.00,but today i (listen)am listening to music at 10.00

20.Everyday,I (go)go to school by bike but today I (go)am going to school by motorbike

21.Every morning,my father(have)has a cup of coffe but today he(drink)is drinking milk

22.At the monment,I(read)am reading a book and my brother(watch)is watching TV

23.Hoa(live)livesin Ha Noi ,and Ha (live)lives in HCM city

24.Hung and his friend(play)are playing badminton

25.They usually(get up)get up at 6.00 in the morning

26.Ha never(go)goes fishing in the winter but she always(do)does it in the summer

27.My teacher(tell)tells Hoa about Math

28.There(be)are animals in the circus

29.Does he(watch)watch TV at 7.00 every morning?

30.What does she (do)do at 7.00 a.m

31.How old is she(be)?

32.How is she(be)?

33.My children(go)go to school by bike

34.We (go)go to supermarket to buy some food

35.Mr.Hien(go)goes on business to Ha Noi every month

36.Ha(like)likes coffee very much,but I(not like)don't like it

37.She(like)likes Tea,but she (not like)doesn't like coffee

38.I(love)love cats,but I(not love)..don't love dogs

39.Everyday,I (go)go to school on foot,but today I(go)am going to school by bike

CHÚC BẠN HỌC TỐT.

Bài tập kết hợp thì hiện tại đơn và thì hiện tại tiếp diễn

1.Where .......do.........you(live)......live........?

I (live)...........live..........in Hai Duong town.

2.What ........is...........she (do).............doing...........?

sHe (water)......is watering........flower in the garden.

3.What .............does.........she(do)............do.........?

She (be)............is......a teacher.

4.Whe-re...........are............you(be) f-rom?

5.At the moment,my sister(play).......is playing.......volleyball and my brother(play)..is playing.soccer.

6.It is 9.00,my family(watch)......is watching.......TV.

7.In the summer,I usually(go).....go........to the park with my friend,and in the spring,we (have)........have........Tet Holiday;I(be).........am......happy because I always(visit)......visit.......my granparents.

8.........Does......your father(go).....go.........to work by bus?

9.How..............does.......your father (go)..........go.............to school?

10.What time.......do......they (get up).........get up.............?

11.What.........do...........they(do).............do.........in the winter?

12.Today,we(have)..........have.........English class.

13.Her favourite subject(be).........is..........English

14.Now ,my brother (like)....like to..........eating bananas

15.Look!Aman(call)......is calling...you

16.Keep silent!I(listen)..........am listening........to the radio

17....................Are.....you(play).................playing.........badminton now?

18.Everyday,my father(get up)......gets up.......at 5.00 a.m,but today,he (get up)........gets up..........at 6.00a.m

19.Every morning,I(watch).........watch........TV at 10.00,but today I (listen)...............listen...........to music at 10.00

20.Everyday,I (go).........go........to school by bike but today I go to school by motorbike

21.Every morning,my father(have)......has.......a cup of coffebut today he(drink).....drinks....milk

22.At the monment,I(read)...........am reading...........a book and my brother(watch)........is watching............TV

23.Hoa(live)...lives........in Ha Noi ,and Ha (live).....lives..........in HCM city

24.Hung and his friend(play)...........are playing.......badminton

25.They usually(get up)................get up.............at 6.00 in the morning

26.Ha never(go)........goes.......fishing in the winter but she always(do).......does........it in the summer

27.My teacher(tell)...........is telling.........Hoa about Math

28.There(be)............are........animals in te circus

29............Does...........he(watch).......watch...........TV at 7.00every morning?

30.What.............does............she (do)...............do..........at 7.00 a.m

31.How old...is............she(be)?

32.How ........is...........she(be)?

33.My children(go)..............go.............to school by bike

34.We (go)..............are going.........to supermarket to buy some food

35.Mr.Hien(go).............go.........on business to Ha Noi every month

36.Ha(like).............likes...........coffee very much,but I(not like)...........don't like........it

37.She(like)..........likes.............Tea,but she (not like)...........doesn't like........coffee

38.I(love)......love..........cats,but I(not love)..............don't love..............dogs

39.Everyday,I (go)......go.......to school on foot,but today I(go)........go........to school by bike

1,Where do you live ?I live in Hai Duong town

2,In tthe summer,I usually go to the park with my friend,and in the spring,we have Tet Holiday,I am happy because I always visit my grandparents.

3 Is your father going to work by bus?

4,What do they do in the winter?

5,Look!Anna is calling you

6 Are you playing badminton now?

7.Everyday,my father gets up at 5.00 a.m,but today,he gets up at 6.00 a.m

8,Everymorning,I watch TV at 10.00,but today I listen to music at 10.00

9.Everday,I go to school by bike but today I go to school by motorbike 

10 Does he watch TV at 7.00 everymorning

11,John doesn't have Maths lesson on Monday.\

12.My brother doesn't live in London,he lives in Manchester.

13,Usually,I have lunch at 12,00- Do you have lunch at 11,00?

14,What does .Mr.Ha live ?

15,Every year,I usually go VietNam.

1,Where do you live?I live in Hai Duong town

2,In tthe summer,I usually go to the park with my friend,and in the spring,we have Tet Holiday,I am happy because I always visit my grandparents.

3 Does your father go to work by bus?

4,What do they do. in the winter?

5,Look!Anna is calling you

6 Are you palying badminton now?

7.Everyday,my father gets up at 5.00 a.m,but today,he is getting up at 6.00 a.m

8,Everymorning,I watch TV at 10.00,but today I am listening to music at 10.00

9.Everday,I go to school by bike but today I go to school by motorbike 

10 Does he watch TV at 7.00 everymorning

11,John doesn't have Maths lesson on Monday.\

12.My brother doesn't live in London,he lives in Manchester.

13,Usually,I have lunch at 12,00- Do you have lunch at 11,00?

14,What does Mr.Ha live?

15,Every year,I usually go VietNam.

Chúc bạn học tốt

1,Where..do.......(do)you(live)....live....?I(live).....live....in Hai Duong town

2,In tthe summer,I usually (go)....go....to the park with my friend,and in the spring,we(have)..have..........Tet Holiday,I(be)..am.........happy because I always (visit)..visit......my grandparents.

3.....Did..................your father(go)........go..........to work by bus?

4,What...do..........they (do)......do.......in the winter?

5,Look!Anna (call).is calling..............you

6........Are.......you (play)....playing................badminton now?

7.Everyday,my father (get up)....gets up....................at 5.00 a.m,but today,he(get up)..is getting up............at 6.00 a.m

8,Everymorning,I (watch).....watch.............TV at 10.00,but today I(listen)...am listening.............to music at 10.00

9.Everday,I (go)...go..........to school by bike but today I go to school by motorbike 

10.........Does.........he(watch)..watch...........TV at 7.00 everymorning

11,John (not have)....dosn't have..........Maths lesson on Monday.

12.My brother(not live).....doesn't live...........in London,he(live)...lives..........in Manchester.

13,Usually,I (have).....have.........lunch at 12,00-.......Do............you(have)....have......lunch at 11,00?14,What ....does...........Mr.Ha(live)....live..........?

15,Every year,I usually(go)...go..............VietNam.

You bít lm roay mak cứ giả vờ ko bít lm  

1.We (not go) ...............DIDN'T GO.............to the cinema last week.

2. Mrs. Loan (teach).............TAUGHT..............us Math two years ago.

3.Last Sunday, Daisy (iron)................IRONED..............all her clothes.

4. She (do).................DOES..........her homework recently.

5. I want (come)..........TO COME..............with my mother.

6. The doctor advised me(not smoke)...........not to smoke............cigarettes.

7. The boys stopped (play)..........PLAYING..........football because of the rain.

8. Students have (wear)............TO WEAR........uniform when they go to school.

9. Mai’s mother told Mai (correct)...........TO CORRECT..............the mistakes in her dictation.

10. This bike ( use ).........................USED...................................for six months.

11. I ( watch).................WAS WATCHING........ T V when the phone (ring)..................RANG......................

12. Would you like ( take) ..............TO TAKE........................a photo?

13. It is interesting ( study)..........TO LEARN....................English.

14. Tom used ( like) ...........TO LIKE........riding the bike when he ( be)..............WAS...... a child.

He (not drink).......DIDN'T DRINK........(some) ...SOME.... wine last year. He often (go) .....GOES....... out at

night although he (use)....USED....to stay home and (watch).....WATCHES....... TV at night. He

(tell) .......TOLD..... about (he).....HIM..... last night to us. There (be) ......WAS.....a TV set at his

house 3 years ago. He (be) ...IS.....going ( buy) ....TO BUY.... a new ........... next month.

15. Mrs. Ha (like) .........LIKED........... playing volleyball when she (be) .......WAS..... young.

She prefers (look)........LOOKING.........children playing volleyball together.

16. She never (allow)...ALLOWS... her students (go) ...GO... out. She (use) ...USE.. think that

children (ought)..........OUGHT...... get up early in the morning and (go) GO ... to bed

early ......IN..... the evening .

17. The disease (spread).......IS SPREADING..........fast now. Marconi (invent)........IS INVENTING.......the radio.

The students must (be)........BE........back by 5.30 p.m Nam (like)........LIKES..... basketball. I

hope (visit).........VISIT........you in Hanoi soon. Why (be)......DID........... Lan absent from

school yesterday? I’d like (buy).........TO BUY........a new dictionary. Nga

(receive)..........RECEIVED.........a letter two days ago. Yesterday, Mai(go)....WENT....... to the

supermarket. Nam would like (tell)......TO TELL.........you about his family. Vegetables often

(have)............HAS.....dirt from the farm on them. Be careful, the children

(cross).......ARE CROSSING......... the street. Mai (be)..........WILL BE.....15 years old next year. I (not

watch)............DIDN'T WATCH.........TV last night, he(read).......READ........a newspaper.

You should (add)...ADD......a little salt. I (be).....AM....very tired when (catch).......CATCHED...... a bad

cold two day ago. You should (go).....GO.......to bed early. I hope you

(feel)........TO FEEL.........better soon. All of students (wait)..........ARE WAITING.........for the principle in the

school yard now. Hoa (need)......NEEDS.........a lot of sugar. Ba (not come) .........DIDN'T COME..........to

the meeting last week. Nga never (take)........TAKES........ medicines.

18. Mai lived in Hanoi last month, but now she (live)........IS LIVING.............in Danang. Last

week, she (go)........WENT...........shopping with her mother. She (buy)............BOUGHT.............a lot

of things there. Yesterday, She (had) ........HAD...........a small party at her house. She

(invite) ............INVITED............... some new friends in her new school and the neighborhood.

This morning, she (go)...........GOES...........to her new school. And she (feel) ........FEELS..............

very happy. She (think).........THINKS..............that she (go) ............GOES......... to school by bus

because there is a bus stop near her house.

19. He (go) ....WENT...... to school when he was 14 years old. He (see) .......SAW.... Tom in a

small house and they(write) ....WROTE...... many stories in 1997. They (live) ....LIVED...... there 3

months and (move) ......MOVED..... to Hue . They (build) ......HAD BUILDED....... a new house(live) ........ .

They (work) ...........WORKS...... with deaf-mute and (invent) ....INVENTS..... a device (name) .......NAME......

phone. Now they ( live) ......ARE LIVING....... in a big house with modern equipments. Tom

(watch).......WATCHES...... TV news every night (know).......KNOWS...... the world.

They(be)......ARE.....proud....OF..... themselves .

1.chats 2Did They see 2.don't eat 4Will Nam return 5.danced ,sang 6.will he go 7.Does...ride 8.are you waiting 9,do..do 10.did he fly 1-.is having 12.were you doing 13 Gets up 14 brushes 15 goes 16does...take 17.Will..see

1. Why are you looking at me like that?

2. won't go

3. goes

4. didn't remember

5. prefers

6. doesn't like

7. get up

8. live/is living

9. goes

10. is stays/stays

11. is not raining

12. am learning

13. has got better/is getting better

14. am using

15. What are they talking about?

1. What about going for a swim ? It's very hot today

Why ........................................................................

2.Can I help you ?

What .......................................................................

2.Chia động từ :

1.What DOES your son HAVE breakfast usually ?

He usually EATS a carrot and DRINKS a glass of cold water ?

2.They ARE DRINKING some fruice at the moment

3.She can SPEAK English

4.DOES he EAT a lot of meat?

5.My mother WILL GIVE me a new bike next week

6.He DOESN'T often GO to the movies on Sunday nights

7.Where IS Mai now ?She IS PLAYING in the garden

8. Look ! She IS COMING.

9.What DRINK IS there for dinner ?

3.Correct the mistakes

1.Tom sonetimes is (IS SOMETIMES) late for class

2.I sit (AM SITTING) in class now

3.What does (IS) the weather like?

4.John likes to talking (TO TALK) pictures

5.Tom always doesn't (DOESN'T ALWAYS) go to school late

6.I have some letter (LETTERS) to post

7.I feel (AM FEELING) hungry now

8.How many (MUCH) milk would you like ?

9.Is (ARE) there any eggs in the fridge

10. She doesn't has (HAVE) classes on Saturday

1.Viết lại câu :
1. What about going for a swim ? It's very hot today

Why ...don't we go swimming ?.........

2.Can I help you ?

What ....can I help you?.....

2.Chia động từ :

1.What does your son (have)...have....... breakfast usually ?

He usually (eat).....eats.....a carrot and (drink)....drinks...... a glass of cold water

2.They (drink) ......are drinking.... some fruice at the moment

3.She can (speak)......speak....English

4.Does He ( eat).....eat..... a lot of meat?

5.My mother (give)....will give......me a new bike next week

6.He ( not go )..won't go........ often to the movies on Sunday nights

7.Where is Mai (be).......... now ?She (play)....is playing...... in the garden

8. Look ! She (come)...is coming.......

9.What are there (be) (drink)....drinks......for dinner ?

3.Correct the mistakes

1.Tom sometimes is late for class => Tom is sometime late for class.

2.I sit in class now => I am sitting in class now

3.What does the weather like ? => is

4.John likes to talking pictures => talking to

5.Tom always doesn't go to school late => doesn't always

6.I have some letter to post => letters

7.I feel hungry now (không có)

8.How many milk would you like ? => much

9.Is there any eggs in the fridge? => Are

10. She doesn't has classes on Saturday => have

1.Viết lại câu :
1. What about going for a swim ? It's very hot today

Why don't we go for swim? It's very hot today.

2.Can I help you ?

What can I help you?

2.Chia động từ :

1.What does your son (have) have breakfast usually ?

Does He usually (eat)eat a carrot and (drink) drink a glass of cold water ?

2.They (drink) are drinking some fruice at the moment

3.She can (speak) speak English

4. Does He ( eat) eat a lot of meat?

5.My mother (give) will give me a new bike next week

6.He ( not go ) doesn't often go to the movies on Sunday nights

7.Where is Mai (be) ....... now ?She (play) is playing in the garden

8. Look ! She (come) is coming

9.What are there (be) to drink (drink) for dinner ?

3.Correct the mistakes

1.Tom sonetimes is late for class

sometimes is -> is sometimes

2.I sit in class now

sit -> am sitting

3.What does the weather like ?

does -> is

4.John likes to talking pictures

to talking -> to talk

5.Tom always doesn't go to school late

always doesn't -> doesn't always

6.I have some letter to post

letter -> lettera

7.I feel hungry now

\(\varnothing\)

8.How many milk would you like ?

many -> much

9.Is there any eggs in the fridge

Is -> Are

10. She doesn't has classes on Saturday

has -> have

1. live

2. didn't go

3. go

4. staying