1.I could/can do gymnastics when i was young.                                                                                                                                                 2.Why couldnt /cant you come to the party ?It was great.                                                                                                                                  3.Ethan cant/couldnt play football because he hasnt got his trainers.                                                                                                                 4.Dad couldnt/could drive when he was fourteen ,but he could/can now.                                                                                                            5.Leo 

Điền can - cant-coud -coudnt-didnt need to-must -mustnt-neednt

1) He ....play chess when he was young

2) You ... drive  a car when you are 18

3) Jack spends the whole day just walking around. He ... have a job

4) When I was in school I... do a hand stand , but now Iam too old .I .. do one any more

5) My mother keeps telling me what we .. wash our hands before we sit down at the dinner table

6 you ... forget to turn off the lights when you go to bed

7 when i was a child i ... understand adults ,now that Iam an adult I ...i underderstand children 

1. He does not eat .. A. many fishes B. too much fish C. many fish D. much fishes 2.Barbara couldnt sing or dance. .. A. So could Mary B. Mary couldnt either C. Neither did Mary D. Mary couldnt, too 3. It has rained for a week, and I .. about our barbecue tomorrow. A. will worry B. am worrying C. will be worrying D. have worried 4. I am sorry, Im late. If my phone hadnt rung at nine o' clock, I .. still in bed now. A. may be B. might have been C. might be D. may have been 5.My bother can play the guitar and .. A. I can either B. so can I C. too can I D. I cant too 6.Will you come to the party tomorrow? Ill if I .. no visitors. A. have B. had C. will have D. am having 7.These students .. so much that they feel very tired and bored. A. are made to study B. are made study C. are making to study D. ate made to be studied 8. When we arrived at the station, there were .. people with tickets in hands standing excitedly at the entrance A. so few B. so many C. so much D. so little 9.Cheating while taking exams is not .. A. accept B. accepted C. acceptance D. acceptable 10. I'd better reserve a seat today .. the train is full tomorrow. A. if B. unless C. in case D. without

1 She didnt talk to him because she was shy
If.....
2 Peter didnt come, so we cancelled the meeting.
If.....
3 Jack was late to the meeting because his watch was slow.
If......
4 We dont live in the city, so we cant easily get access to the Internet.
If....
5 he didnt take part in the event because he lacked confindence.
If....
6 she didnt talk to him because she was shy
If....
7 peter didnt come, so we cancelled the meeting
If....
8 jack was late to the meeting because his watch was slow.
If....
9 we dont live in the city, so we can easily get access to the internet.
If....
10 i dont have enough free time, I cant help my mother with the housework
If......
11. The crops will be ruined if I doesnt rain soon.
Unless......
12 unless the weather is fine, we'll stay at home
If.....
13. I cant go with you unless I get my workfinished.
If.....
14 if you dont leave on the 15th, you'll get home late for your mother's party.
Unless.....
15 . Tom never does anything unless his father tells hime what to do.
If......

ex1. complete each sentence with can / could / be able to { not }

1. _______________ you swim when you were 10 ?

2. we ________ get to the meeting on the ttime yesterday because the train was delayed by one hour

3. he __________ arrive at the party on the time even after misting the train , so he was very pleased

4. he's amezing , he _____________ speak 5 langusges including chinese

5. I _____________ drive a car until I was 34 , then I moved to the countryside so I had to learn

6. I looked everywhere for my glasses but I _______________ find them anywhere

7. I searched for your house for ages , luckily I ____________ find it in the end

ex2. complete each sentence with can / could / be able to { not }

1. I ____________________ understand the chapter we had to read for homework . It was so diffcult

2. I ______________ lift this box - it's too heavy . would you help me ?

3. lucy _____________ make it to our meeting after all. she's stuck in traffic at the moment

4. john ________________ play tennis really well . he's champion of his club

5. unfortunately , I really ___________sting at all . no - one in my family is musical either

6. when the car broke down I was really pleased because I _________ solve the problem

7. julian _____________ play excellent goft when he was only ten

Choose the correct answer.
Choose: Can/ Can’t, Could/ Couldn’t, Must/ Mustn’t.
1. You ____ must_____ work harder if you want to pass the exam.
2. I don’t want anyone to know. You ________ tell anyone.
3. _________ you please open the door? 
4. _________ I go out tonight? No, you _________ study English.
5. We haven’t got much time. We ________ hurry.
6. He _________ play tennis very well now but he _________ play really well when
he was young.
7. Tom _________ drive but he hasn’t got a car.
8. The boy fell into the river but fortunately we _________ rescue him.
9. We haven’t got enough food at home so we _________ go shopping today.
10. She wasn’t at home when I phoned but I _________ contact her at her office.
11. I can’t stay in bed tomorrow morning because I ________ work. AI NHANH TUI TICK NHA

I. Choose the underlined part among A,B,C or D that needs correcting

32 Your \(\)gradfather could speak five languages, could he?

33 she spoke in a very low voice, but I can understand what she said

34 I used to be to stand on my head but I can't br able to do it now

35 The trip was cancelled last week. John couldn't go away because he was ill

II. Complete the questions by adding the tag questions

1. Paul doesn't like football,....

2. You have got a sister,...

3. You haven't done you homework,...

4. You sat next to Helen,....

5 Your name is John,....

6. I didn't leave my wallet on the desk,...

III. Complete the sentences with could was/were or able to n't

1. Jack was an excellent tennis player. He.... beat anybody

2. The fire spread quickly but everyone... escape

3. They didn't have any tomatoes in the in the first shop I went to, but I..... get some in the next shop

4. He can't play tennis very well now but he.......play quite well when he was younger

5. The boy fell into the river but fortunately we........ rescue him

6. She wasn't at home when I phoned but I ...... contact her at her office