Write the sentences in passive form. Number 1 is an example for you.
1. I have heard her sing this song several times.
She has been heard to sing this song several times.
2. People saw him steal your car.
..........................................................................................................................................
3. The teacher is watching her student do the homework.
..........................................................................................................................................
4. He won’t let you do that silly thing again.
..........................................................................................................................................
5. People make the children work hard.
..........................................................................................................................................
6. They made him work all day.
..........................................................................................................................................
7. The detective saw the woman putting the jewelry in her bag.
..........................................................................................................................................
8. The terrorists made the hostages lie down.
..........................................................................................................................................
9. Police advise drivers to use an alternative route.
..........................................................................................................................................
10. She helps me to do all these difficult exercises.
..........................................................................................................................................
 

Ex 4. Chuyển các câu với động từ chỉ nhận thức sau sang câu bị động

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

=> ........................

2. People saw him steal your car.

=> ........................

3. The teacher is watching the work.

=> ........................

4. He won't let you do that silly thing again.

=> ........................

5. People don't make the children work hard.

=> ........................

6. They made him work all day.

=> ........................

III. CHUYỂN CÁC CÂU SAU SANG BỊ ĐỘNG (Dạng động từ chỉ giác quan) :

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

          2. People saw him steal your car.

          3. The teacher is watching them work.

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

          5. People don’t make the children work hard.

          6. They made him work all day.

          7. The detective saw the woman putting the jewelry in her bag.

          8. The terrorists made the hostages lie down.

          9. Police advise drivers to use an alternative route.

          10. She helps me do all these dificult exercises

VI.  Chuyển các câu với động từ chỉ nhận thức sau sang câu bị động
64. I have heard her sing this song several times.
65. People saw him steal your car.
66. The teacher is watching the work.
67. He won’t let you do that silly thing again.
68. People don’t make the children work hard.
69. They made him work all day.
70. The detective saw the woman putting the jewelry in her bag.
71. The terrorists made the hostages lie down.
72. Police advise drivers to use an alternative route. 
73. She helps me to do all these difficult exercises.
VII.  Cho dạng đúng của động từ trong ngoặc
74. Toshico  had  her car (repair)    by a mechanic.
75. Ellen  got Marvin (type)    her paper.
76. We  got  our house (paint)    last week.
77. Dr Byrd is having the students   (write )    a composition.
78. Mark  got  his transcripts (send)    to the university.
79. Maria is having her  hair (cut)    tomorrow.
80. Will Mr. Brown have the  porter (carry)    his luggage to his 
car?

Wirte the sentences in passive from

1, I have heard her sing this song several time

2. People saw him steal your car

3. The teacher is watching her student do the homework

4. He won't let you do that silly thing again

5. People make the children work hard

6. They made him work all day

7. The detective saw the woman putting the jewelry in her bag

8. The terrorits made the hostages lie down

9. Police advise drivers to use an alternative route

10. She helps me to do these difficult exercises

Change the following sentences into passive voice:

1. No one told us the news.
2.Paul didn't tell me the ending of the story.
3.the teacher will give her a prize if she works well.
4.her mother bought her a doll last week.
5.the police found the robber in the forest yesterday.
6.they made him work all day.
7.people don't make the children work hard.
8.they let him meet her family last month.
9.he won't let you do that silly thing again.
10.people saw him steal your car.
11.i have heard her sing this song several times.
12.the teacher is watching them work.
13.alice had a mechanic repair her car.
14.ellen got Marvin to the her paper.
15.the hairdresser is cutting Mary's hair now.
ーMary is having her hair___________________________________.
ーMary is having he hairdresser___________________________________.
16.People know that English is an international language.
ーIt is known_____________________________________.
ーEnglish is known_____________________________________.
17.they said that she won the competition.
ー__________________________________________________.
ー__________________________________________________.
18.they reported that the President had suffered a heard attack.
ー______________________________________________________.
ー______________________________________________________.
19.they need to clean the window.
ー_______________________________________________________.
ー________________________________________________________.

Change the following sentences into passive voice:

1. No one told us the news.
2.Paul didn't tell me the ending of the story.
3.the teacher will give her a prize if she works well.
4.her mother bought her a doll last week.
5.the police found the robber in the forest yesterday.
6.they made him work all day.
7.people don't make the children work hard.
8.they let him meet her family last month.
9.he won't let you do that silly thing again.
10.people saw him steal your car.
11.i have heard her sing this song several times.
12.the teacher is watching them work.
13.alice had a mechanic repair her car.
14.ellen got Marvin to the her paper.
15.the hairdresser is cutting Mary's hair now.
ーMary is having her hair___________________________________.
ーMary is having he hairdresser___________________________________.
16.People know that English is an international language.
ーIt is known_____________________________________.
ーEnglish is known_____________________________________.
17.they said that she won the competition.
ー__________________________________________________.
ー__________________________________________________.
18.they reported that the President had suffered a heard attack.
ー______________________________________________________.
ー______________________________________________________.
19.they need to clean the window.
ー_______________________________________________________.
ー________________________________________________________.

Chuyển các câu với động từ chỉ nhận thức sau sang câu bị động
1.I have heard her sing this song several times
2.People saw him steal your car
3.The teacher is watching the work
4.He won't let you do that silly thing again
5.People don't make the children work hard
6.They made him work all day
7.The detective saw the woman putting the jewelry in her bag
8.The terrorists made the hostages lie down
9.Police advise drivers to use an alternative route
10.She helps me to do all these difficult exercises