10 động từ khuyết thiếu (p2)

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ĐỘNG TỪ KHUYẾT THIẾU – PHẦN 2
I. Tóm tắt bài giảng
Cấu trúc câu dự đoán:
 Dự đoán ở hiện tại:
Can / may / will / must / should / need / ought to … + Vinf
Ví dụ: You have worked hard all day; you must be tired.


Dự đoán ở quá khứ:

* Dự đoán một việc chắc chắn ( 100 %) đã xảy ra trong quá khứ: must have PII
Ví dụ: He got a high score. He must have worked hard.
* Dự đoán chắc chắn 100 % không thể xảy ra trong quá khứ: can't / couldn't have PII
Ví dụ: She can't have been at the party yesterday. She was teaching then.
(Cô ta không thể có mặt tại bữa tiệc ngày hôm qua được. Lúc đó cô ta đang dạy.)
* Dự đoán có khả năng diễn ra trong quá khứ (70-80%), chưa chắc đã xảy ra:
may / might have PII
Ví dụ: He lost his key. He might have come into the house through the window.
( quan điểm chủ quan của người nói)
* should have PII: đã nên làm gì trong quá khứ
Ví dụ: You should have informed me of your arrival.
* would have PII: trong câu điều kiện loại 3
Ví dụ: If I had known she was coming, I would have prepared more food. (Nếu tôi biết cô ấy
đến, tôi đã chuẩn bị thêm thức ăn.)
 Bài tập chữa trong video
MODAL VERBS
1. You have to do your homework every day.

A. Your homework has been done every day.
B Your homework has to do by you every day.
C Your homework has to be done every day.
D Your homework have to be done every day.
2. You shouldn’t tell her the news. It might kill her.
A. She shouldn’t be told by the news. She might be killed.
B. The news shouldn’t be told her. She might be killed.
C. She shouldn’t be told the news. She might be killed.
D. She shouldn’t been told the news. It might be killed.
3. It wasn't obligatory to submit my assignment today.
A. My assignment must have been submitted today.
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B. I needn't have submitted my assignment today.
C. My assignment was required to submit by today.
D. I mustn't submit my assignment today.
4. It's time we left for the disco.
A. We may leave for the disco now.
B. We needn't leave for the disco now.
C. We should leave for the disco now.
D. We must have left for the disco now.
5. It was a mistake of you to lose your passport.

A. You shouldn't have lost your passport.
B. There must be a mistake in your passport.
C. You needn't have brought your passport.
D. Your passport must be lost.
6. My car keys are possibly in the kitchen.
A. My car keys should be put in the kitchen.
B. My car keys cannot be in the kitchen.
C. I don’t know whether my car keys are in the kitchen.
D. My car keys might be in the kitchen.
7. Is it possible for me to come to your house at about 7pm?
A. Must I come over to your house at about 7pm?
B. Could I be coming to your house at about 7pm?
C. Can I come to your house at about 7pm?
D. Will I come to your house at about 7pm?
8. You must never take off your helmet while you are riding a motorcycle.
A. If you are riding a motorcycle, you needn’t wear a helmet.
B. When you are riding a motorcycle, wearing a helmet is not a must.
C. You needn’t wear a helmet whenever you are riding a motorcycle
D. Helmets must be worn at all times when you are riding a motorcycle
9. I have done this math problem at least twenty times, but my answer is wrong according to the
answer key.
A. The answer in the book should be wrong!
B. The book needn't have a wrong answer.
C. There is a wrong answer in the book.
D. The answer in the book must be wrong!
10. Can you tell me directions for the station near here?
A. Would you tell me where to get to the station near here?
B. Could you tell me how to get to the station near here?
C. Could you tell me what to get to the station near here?
D. Must you tell me the way to get to the station near here?

11. A: John passed his exam with a distinction.
B: _______.
A. He was too lazy to succeed
B. He can't have studied very hard
C. He must have studied very hard
D. He needs studying harder
12. I often get up early in the morning.
A. I’m used to getting up early in the morning
B. I’m used to get up early in the morning.
C. I used to get up early in the morning
D. I used to getting up early in the morning.

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13. Please don’t use the shower after midnight
A. Would you mind not to use the shower?
B. Would you like to use the shower before midnight?
C. I don’t want you to use the shower.
D. Would you mind not using the shower after midnight?
14. The carpet still needs cleaning.
A. The carpet has been cleaned.
B. The carpet hasn’t cleaned yet.

C. The carpet has not been cleaned.
D. The carpet has cleaned.
15. He said that he _________ enter the examination room because he was late.
A. mustn’t
B. couldn’t
C. needn’t
D. might not
16. You haven’t eaten anything since yesterday afternoon. You ______ be really hungry!
A. must
B. might
C. will
D. can
17. “Why are you so late?” – I _________ take my aunt to the airport. The traffic was terrible!”
A. might
B. could
C. had to
D. should
18. I wonder who drank all the milk yesterday. It _____ have been Mary because she was out all
day.
A. can’t
B. must
C. could
D. needn’t
19. Susan ___________ hear the speaker because the crowd was cheering so loudly.
A. might not
B. couldn’t
C. can’t
D. mustn’t
20. Ted’s flight from Britain took more than 11 hours. He _____ be exhausted after such a long
flight.

A. had better
B. can
C. must
D. should
II. Tài liệu đọc thêm
Modal Verb

Substitute

Example

must

to have to

I must swim. = I have to swim.

must not

not to be allowed to

I must not swim. = I am not allowed to swim.

can

to be able to

I can swim. = I am able to swim.

may

to be allowed to

I may swim. = I am allowed to swim.

need

to have to

I need to swim. = I have to swim.

need not

Trợ động từ + not + have
to

I need not swim. = I don't have to swim.

shall / should/ to be supposed to / to be
ought to
expected to / to be to

I shall / should / ought to swim. = I am supposed
to swim. / I am expected to swim. / I am to swim.

will

I will go swimming = I am going to go
swimming.

Be going to

III. Bài về nhà
Exercise 1. Complete the following sentences with CAN'T, MUST, MIGHT
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1) I can hear some music coming from that window. He

be at home.

2) Mark told me Sarah was working late today, so she
3) Harry doesn't answer the phone. He
4) Ring! Ring! That
5) I

be home right now.

be in the movies.

be mom; she said she'd call me back in a minute.

have left my keys in the car...or maybe at John's.

6) Sue is late for class. She
7) That DVD

have missed the bus.

cost more that 15€; it's an old movie!

8) Christina has already been three times to that new pizza restaurant. It
9) Robert always gets straight A's. His parents

be really good.

be really proud of him.

10) Her new boyfriend is absolutely gorgeous. He

be a model.

11) A: What's that deafening noise out there?
B: My downstairs neighbors

be having another barbecue. It's the fifth one this month!

12) A: Have you called Sam?
B: yeah, but he

have already left, because nobody answered the phone.

13) A. How much further do we have to go?

B: Not much. Her house

be very far from here.

14) Lisa failed her driving test, so she

be in a good mood right now.

15) George wasn't promoted as he had expected, so he
himself.
16) He and his sister

come with us if their parents give them permission.

17) Your son is such a gifted student! He
18) He

be totally disappointed with

be chosen Valedictorian of his year.

be from France, he doesn't speak a word of French!

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19) mmmm...It smells delicious! My father
20) I
weekend!

be cooking!

go to the party, but I'm not completely sure; I've got so many things to do this

Exercise 2. Choose among the modal verbs: could / might / should / would to complete
the following sentences.
1. Donna: If I won the ten million dollar lottery jackpot, I
travel the world.
Sam: Where

afford to quit my job and

you go if you had that much money?

Donna: I don't know, I
to Kenya.

choose to spend a year in Paris - or perhaps I

go

Sam: How often do you buy lottery tickets?
Donna: Never... I guess if I want to win the lottery, I

Sam: That

help.

2. Jan: What

we look for in a candidate when we vote in a presidential election?

Peter: I think citizens
life in the United States.
Jan: What
Peter: I

try buying some tickets.

vote for a President who has the ability to improve the quality of

you do if you were President of the United States?
focus on reducing environmental pollution.

Jan: Every candidate always says he's going to do that, but it's a really complicated problem - it's
not one which is easily solved. What makes you think you

actually stop pollution?

Key
Exercise 1
1. must
8. must
15. must

2. can't
9. must
16. might

3. might
10. might
17. might

4. must
11. must
18. can't

5. might
12. must
19. must

6. might
13. can't
20. might

7. can't
14. can't

Exercise 2
1. could, would, might, would, might, might
2. should , should , would , would , could

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