1.  They did this exercise well.

2.  They must wash this dress in cold water.

3.  He hasn't made any mistakes in his composition. 

4. He will exhibit his painting for the first time by New Arts Gallery.

5.  They built this house 1000 years ago.

6.  They make these artificial flowers of silk.

7.  The students are writing the lessons now.

8.  They have to do this job at once.

9.  They feed these animals at the zoo twice a day.

10.  French doctors are going to perform the operation.

11. They have made all the arrangements.

12. When did they manufacture this radio?

13. We couldn't find them anywhere.

14. Is she teach mathematics in this school?

15. The accident didn't damage the machinery fortunately.

16. Please wait here while we are examining your luggage.

17. How do they make candles?

18. For a long time they believed that the earth was flat.

19. Did your teacher teach you how to apply this theory?

20. They say that apples are good for our health.

21. Don't let the children tease the dog. 

22. They believed that red is the symbol of luck.

23.What have they done to help the poor in the city.

24. The robber has stolen her jewelry while she was out.

25. Where did pirates used to hide the treasure in the old time.

Change into active voice:

1. This dress must be washed in cold water.

\(\Rightarrow\) They must wash this dress in cold water.

2.No mistakes have been made in his composition.

\(\Rightarrow\) He has made no mistakes in his composition.

3.His painting will be exhibited for the first time by New Arts Gallery.

\(\Rightarrow\) New Arts Gallery will exhibite his painting for the fist time.

4.This house was built 100 years ago.

\(\Rightarrow\) They built this house 100 years ago.

5.These artificial flowers were made of silk.

\(\Rightarrow\) They made these artificial flowers of silk.

6.The lesson are being written by the students now.

\(\Rightarrow\) The students are writting the lesson.

7.This job has to be done at once.

\(\Rightarrow\) They hane to do this job at once.

8.The animals at the zoo are fed twice a day.

\(\Rightarrow\) They feed the animals at the zoo twice a day.

9.Don't let the dogs be teased by the children.

\(\Rightarrow\) The children don't let teased the dogs .

II. Change the following sentences into the active voice：

1. These artificial flowers are made of silk

They make these artificial flowers of silk.

2. No mistakes have been made in his composition

He hasn't made any mistakes in his composition.

3. This dress must be washed in cold water

You must wash this dress in cold water.

4. This house was built 100 years ago

They built this house 100 years ago.

5. The lessons are being written by the students now

The students are writing the lession now.

I/. CHANGE SENTENCES IMTO ACTIVE VOICE ( ĐỔI CÂU SANG A)

1. these exercises were done well.

-> They did these exercises well

2. this dress must be washed in cold water.

-> You must wash this dress in cold water

3. no mistakes have been made in his composition.

-> He hasn't made any mistakes in his composition

4. his painting will be exhibitied for the time by New Arts gallery.

-> New Arts gallery will exhibit his painting for the time

5. this house was built 100 years ago.

-> They built this house 100 years ago

6. these artificial flowers are made of silk.

-> They make these artificial flowers of silk

7. the lessons are being written by the students now.

-> The students are writing the lessons now

8. they could not be found anywhere .

-> I could not find them anywhere

9. Is mathematics taught in this school.

-> Do they teach mathematics in this school ?

II/. CHANGE SENTENCES INTO OPPOSTE VOICE ( ĐỔI CÂU THEO THỂ NGƯỢC LẠI )

1. englsh is spoken all over the world .

-> People speak english all over the world

2. columbus discovered America in 1492.

-> America was discovered by Colombus in 1942

3. did Mark Twain write that book ?

-> Was that book written by Mark Twain ?

4. the house has been built of stone and cement.

-> They build the house of stone and cement

5. the flowers are cut in the garden by my sister.

-> My sister cuts the flowers in the garden

6. somebody is making coffee in the kitchen.

-> Coffee is being made in the kitchen

7. the clothing has been washed by Mai.

-> Mai has washed the clothing

I/. CHANGE SENTENCES IMTO ACTIVE VOICE ( ĐỔI CÂU SANG A)

1. these exercises were done well.

=>People did these exercises well

2. this dress must be washed in cold water.

=>People must wash this dress in cold water

3. no mistakes have been made in his composition.

=>He has made any mistakes in his composition

4. his painting will be exhibited for the time by New Arts gallery.

=>New Arts gallery will exhibit his painting for the time

5. this house was built 100 years ago.

=>People built this house 100 years ago

6. these artificial flowers are made of silk.

=>People make these artificial flowers of silk

7. the lessons are being written by the students now.

=>The students are writing the lessons now

8. they could not be found anywhere .

=>No one could find them anywhere

9. Is mathematics taught in this school.?

=>Do the teachers teach mathematics in this school?

II/. CHANGE SENTENCES INTO OPPOSTE VOICE ( ĐỔI CÂU THEO THỂ NGƯỢC LẠI )

1. englsh is spoken all over the world .

=>People speak English all over the world

2. columbus discovered America in 1492.

=>America was discovered by columbus in 1492

3. did Mark Twain write that book ?

=>Was that book written by Mark Twain?

4. the house has been built of stone and cement.

=>People have built the house of stone and cement

5. the flowers are cut in the garden by my sister.

=>My sister cuts the flowers in the garden

6. somebody is making coffee in the kitchen.

=>Coffee is being made in the kitchen

7. the clothing has been washed by Mai.

=>Mai has washed the clothing

Bai 2: Change these sentence into active voice
1. These exercises were done well
->l did these exercises well
2. No mistakes have been made in his composition
->they haven't made no mistakes in his composition
3. This dress is being made for me by my mother.
->My mother is making this dress for me .
4. I am taught English by my mother everyday .
->My mother teaches English every day
5. A lot of English songs can be sung very well by the girls
->The girls can sing a lot of English songs very well.
6. Our clothes are washed by her everyday.
->She washes our clothes every day

1. These exercises were done well
-> We did the exercises well.
2. No mistakes have been made in his composition
-> He made no mistakes in his composition.
3. This dress is being made for me by my mother.
-> My mother is making this dress for me.
4. I am taught English by my mother everyday .
-> My mother teach me English everyday.
5. A lot of English songs can be sung very well by the girls
-> The girls can sing a lot of English songs very well.
6. Our clothes are washed by her everyday.
-> She washes our clothes everyday.

Exercise 4: Turn the following sentences into passive

1. I have heard her sing this song many times.

she has been heard to sing this song many times

2. People saw him stole your car.

he was seen to steal your car

3. The teacher is watching us work.

our work is being watched by the teacher

4. We won’t let you do that silly thing again.

you won't be let to do that silly thing again

5. The manager don’t make the employees work hard.

the employees aren't made to work hard by the manager

6. Don’t make the same mistake.

don't let the same mistake be made

7. Let’s tell them about it.

let they be told about it

8. She advised me to sell that house.

i was advised to sell that house

9. You must see it to believe it.

it must be seen to be believed

10. He orders us to clean the floor.

we are odered to clean the floor

11. You need to have your hair cut.

your hair needs cutting

12. We enjoy writing letters to each other.

we enjoy letters being written

13. Take off your hat and put on the helmet whenever you ride a motorbike.

let your hat be taken off and put on the helmet whenever you ride a motorbike

14. Maria has the porter carry her luggage to her car.

maria has her luggage carried bu the porter

15. Ellen always helps me to do all the difficult exercises.

i always have ellen helped me to do all the difficult exercises

giup voi

1. English is spoken over the world

=> People speak english over the world.

2. We aren't taught Maths by Mr Minh

=> Mt minh doesn't teach us maths

3. There exercise were done well by him

=> he did that exercise well

4.This dress must be washed in cold water

=> they must wash this dress in cold water

5. When was this radio manufactured?

=> when did they manufacture this radio ?

6. No mistakes have been made in his composition

=> he hasn't made any mistakes in his composition

7.The operation is going to be performed by French doctors

=> french doctors are going to perform the operation

8. How are candles made?

=> how do they make candles ?

9. This job has to be done at once

=> They have to do the job at once .

10. They couldn't be found anywhere

=> we couldn't find them anywhere

11. By whom were you met last night?

=> who did you meet last night ?

12. Who is visited every week?

=> who do you visit evrery week ?

1. English is spoken over the world

=> People speak English over the world.

2. We aren't taught Maths by Mr Minh

=> Mr Minh doesn't teach us Maths.

3. There exercise were done well by him

=> He did these exercises well.

4.This dress must be washed in cold water

=> You must wash this dress in cold water.

5. When was this radio manufactured?

=> When did they manufacture this radio?

6. No mistakes have been made in his composition

=> He has made no mistakes in his composition.

7.The operation is going to be performed by French doctors

=> French doctors are going to perform the operation.

8. How are candles made?

=> How do people make candles?

9. This job has to be done at once

=> You must do this job at once.

10. They couldn't be found anywhere

=> We couldn't find them anywhere.

11. By whom were you met last night?

=> Who met you last night?

12. Who is visited every week?

=> Who do you visit every week?

1. English is spoken over the world

=> People speak English over the world.

2. We aren't taught Maths by Mr Minh

=> Mr.Minh doesn't teach us Maths.

3. There exercise were done well by him

=> He does there exercise well.

4.This dress must be washed in cold water

=> You must wash this dress in cold water.

5. When was this radio manufactured?

=>When did you manufacture this radio?

6. No mistakes have been made in his composition

=> He hasn't made any mistakes in his composition.

7.The operation is going to be performed by French doctors

=> French doctors are going to perform the operation.

8. How are candles made?

=> How do you make candles?

9. This job has to be done at once

=> You have to do this job at once.

10. They couldn't be found anywhere

=> We couldn't find them anywhere.

11. By whom were you met last night?

=> Who met you last night?

12. Who is visited every week?

=> Who do you visit every week?

18/Are English taught here?

19/Will she be invited to your wedding party?

20/Was some exercise be given by the teacher?

21/Are big cakes being made for the party by she?

22/Why wasn't he be helped?

23/ How many games have been played by the team

24/Where is English spoken?

25/Who are being kept in the kitchen?

26/By whom are the children looked after?

27/They did these exercise well.

28/People must wash this dress in cold water.

29/The students are writing the lessons now

30/People feed these animals at the zoo twice a day.

31/People have made all the arrangement

32/When did they manufacture this radio?

33/How do they make candles?

34/Do they teach Mathematics in this school?

35/Did your teacher teach you how to apply this theory ?

ý ở câu 21 là by her nhé