Ví dụ: An có quả cân nặng 130g.Để tìm công co của

cơ ngón tay là bao nhiêu thì bạn móc quả cân vào 1

lò xo và để nằm ngang trên bàn ( lò xo không dãn ).

Sau đó An dùng ngón tay kéo lò xo đi được 8cm.

Hỏi công sinh ra do bạn An tác động là bao nhiêu ?

Một chiếc máy bay bay lên với vận tốc 600km/h. Đường bay tạo với phương nằm ngang 1 góc 30 độ. Hỏi sau 2 phút máy bay bay lên cao được bao nhiêu km theo phương thẳng đứng?

Homework 31.8

Rewrite the sentences

1. Although Henry is a millionaire, he hates spending money. (Despite)

@ .........................................................................................................................................

2. Mark went on working although he felt unwell ( In spite of)

@..........................................................................................................................................

3. They slept soundly although the air was hot. ( In spite of)

@..........................................................................................................................................

4. Although the children were poor, they seemed happy. ( In spite of)

@..........................................................................................................................................

5. I enjoyed the film although the story was silly. ( In spite of)

@..........................................................................................................................................

6. He didn’t arrive until 9 o’clock although he promised that he wouldn’t be late. ( In spite of)

@..........................................................................................................................................

7. Because he drove too fast, he caused a serious accident. (because of)

@..........................................................................................................................................

8. We took fewcpictures because the sky was cloudy. (because of)

@..........................................................................................................................................

9. All the teachers love him because his conduct is good. (because of)

@..........................................................................................................................................

10. These students didn’t arrive late although there was the traffic jam. (Despite)

@..........................................................................................................................................

11.Mary can’t sleep because there was the noise. (Because of)

@..........................................................................................................................................

12 . Nick is often punished because he is lazy. (Because of)

@..........................................................................................................................................

Home work 25.08.2021

Rewrite the sentences in the passive:

1. They will construct some new airports on islands.

……………………………………………………………………………………

2. The new president might fulfill this promise as quickly as people would like.

……………………………………………………………………………………

3. They are going to find out the mystery.

……………………………………………………………………………………

4. You can buy videos like this one anywhere.

……………………………………………………………………………………

5. Someone will tell you when you go in to see the doctor.

……………………………………………………………………………………

6.They should finish the hotel by the time you arrive.

……………………………………………………………………………………

7. Someone has to write the history of the European Community one day.

……………………………………………………………………………………

8. They started a dancing class last week

...................................................................................................................................

9. The teacher returned our written work to us

...........................................................................................................................

10. They ought to have reported the accident to the police.

……………………………………………………………………………………

Homework 18.8

Change the active sentences below into passive sentences. 

1.     You should do your homework.

2.     They are painting their house.

3.     No one has drunk milk tea.

4.     Some one has  taught  English for ten years.

5.     She had cleaned the kitchen.

6.     People speak English in the USA.

7.     I`ll build a hospital if I have a million dollars.

8.     The explosion had killed many people.

9.     The heavy storm damaged a lot of crops in Mumbai.

10.                        Milad is helping me solving the active and passive voice exercise.

Choose the best answer

1. We can’t go along here because the road……………………
A. is repairing                    B. is repaired                     C. is being repaired           D. repairs
2. The story I’ve just read………………. Agatha Christie.
A. was written                   B. was written by              C. was written from          D. wrote by
3. I’m going to go out and………………………………………….
A. have cut my hair           B. have my hair cut           C. cut my hair                    D. my hair be cut
4. Something funny ………………………in class yesterday.
A. happened                      B. was happened               C. happens                         D. is happened
5. Many US automobiles……………………in Detroit, Michigan.
A. manufacture                  B. have manufactured       C. are manufactured          D. are manufacturing

Homework  13.8

Chuyển các câu sang sang bị động.
1. Her mother buys this book
2. My mom has baked some cakes.
3. Jenny has been cleaned my car for 2 days
4. The police has looked for the robbers day and night.

5.The little girl rides the bike every night

6.Mr Sam manages the export division

7. the boy studies information technology everyday

8.My father waters this flower every morning.

9.John hasn’t invited Fiona to his birthday party

10.Her mother is preparing the dinner in the kitchen.

11.Our teachers have explained the English grammar.

12.Some drunk drivers causes the accident in this city.

13.The manager doesn’t phone the secretary every morning.

14.The students haven’t discussed the pollution problems since last week.

15.He has broken his nose in a football match.