Phân biệt Needn’t have done & didn't have/need to do trong tiếng Anh

Phân biệt Needn’t have done & didn't have/need to do trong tiếng Anh

Needn’t have done là gì?

Needn’t have done chỉ một hành động đã diễn ra tuy không có bổn phận (làm lãng phí thời gian)

Ví dụ:

You needn’t have watered the flowers, for it is going to rain.

(Lẽ ra bạn không phải tưới hoa vì trời sắp sửa mưa rồi)

You needn’t  have written such a leng essay. The teacher only asked 300 words, and you have written 600 words

(Lẽ ra anh không phải viết một bài luận dài như thế. Giáo viên chỉ yêu cầu 300 từ và anh đã viết 600 từ)

He needn't have bought such a large house. His wife would have been quite happy in a cottage.

(Lẽ ra anh ta không phải mua một căn nhà lớn như thế. Vợ anh ta cũng hoàn toàn sung sướng với một mái nhà tranh.)

You needn ‘t have carried all these parcels yourself. The shop would have delivered them if you had asked them.

(Lẽ ra anh không phải tự mang tất cả những gói hàng này. Cửa tiệm sẽ giao hàng tận nhà nếu bạn yêu cầu họ.)

Didn't have/need to do là gì?

didn't have/need to do chỉ ý nghĩa không có bổn phận mà hành động cũng chưa làm.

I didn't have to translate it for him for he under­stands Dutch

(Tôi không phải dịch nó cho ông ta vì ông ta hiểu tiếng Hà Lan.)

I didn 't have to cut the grass myself. Mv brother did it

(Không phải tôi tự mình cắt cỏ. Em trai tôi đã làm việc đó.)

Một số người dùng didn’t have to/didn’t need to cho những hành động mà nó đã được hành động.

Have hay need thường được nhấn giọng : You didn’t have to give him my name (Bạn không cần phải cho nó biết tên tôi) nhưng nên dùng Needn't have + quá khứ phân từ khi có một hành động không cần thiết diễn ra.

You needn’t have given him my name

(Lẽ ra bạn không phải cho nó biết tên tôi.)

Phân biệt need và have to

Need to do something: cần làm việc gì đó

Mô tả cần làm việc nào đó để mang đến lợi ích.

Ex: I need to do my homework. (Tôi cần làm bài tập về nhà).

Need mang sắc thái nhẹ nhàng.

Have to do something: phải làm gì

Thông thường dùng để nói nên làm việc gì đó mang tính yêu cầu thực hiện.

• I have to do my homework. (Tôi phải làm bài tập về nhà)

=> Nếu không làm sẽ chịu hình phạt (tính cấp thiết).

Have to sắc thái như yêu cầu thực hiện.

Bài tập Phân biệt Needn’t have done & didn't have/need to do

Bài tập 1: Chọn đáp án phù hợp để hoàn thành câu dưới đây:

Câu 1: She got up early as she didn’t know today is her day off. She .................. up early.

A. Needn’t have got

B. Needn’t get

C. Needn’t have get

D. Needn’t got

Câu 2: She .................. up early since this day is her day off, and she didn’t.

A.  Needn’t have got

 B. Didn’t need to get

 C. Needn’t have get

 D. Needn’t got

Câu 3: We ................... We didn’t know that we had enough time.

 A. Didn’t need rush

 B. Didn’t need to rush

C. Needn’t have rushed

D.  Needn’t rushed

Câu 4: We ................... We have enough time.

A. Needn’t rush

 B. Didn’t need rush

C.  Needn’t have rushed

D. Need to rush

Câu 5: Why did you buy a new dress? Yours hasn’t been worn out. You .................. a new one.

A. Needn’t have bought

 B. Need to buy

 C. Needn’t buy

 D. idn’t need buy

Câu 6: This dress hasn’t been worn out. You .................. a new one.

 A. Needn’t buy

 B. Didn’t need buy

 C. Needn’t to buy

 D. Need not to buy

Câu 7: They .................. the camera, as they didn’t use them.

 A. Needn’t bring

 B. Didn’t need to bring

C. Needn’t brought

D. Needn’t have brought

Câu 8: He .................. his beloved car, as he could borrow his parents.

 A. Needn’t have sold

 B. Needn’t sell

 C. Didn’t need sell

 D. Needed to sell

Câu 9: She .................. so many eggs. There are a dozen of them in the frigde.

A. Needn’t buy

B. Needn’t have bought

 C. Didn’t need to bought

 D. Need to buy

Câu 10: Jason .................. a raincoat. Although it didn’t rain, he bring his raincoat along.

 A. Didn’t need to bring

B. Needn’t brought

C. Needn’t have brought

D. Need to bring

Đáp án:

1. A
2. A
3. A
4. A
5. A
6. A
7. A
8. A
9. A
10. A

Bài tập 2: Chọn đáp án đúng nhất để điền vào chỗ trống trong mỗi câu sau.

1. Young people ______ obey their parents.

A. must

B. may

C. will

D. ought to

2. Laura, you and the kids just have dinner without waiting for me. I ______ work late today.

A. can

B. could

C. have to

D. would

3. I ______ be delighted to show you around the factory.

A. ought to

B. would

C. might

D. can

4. Leave early so that you ______ miss the bus.

A. didn’t

B. won’t

C. shouldn’t

D. mustn’t

5. Jenny’s engagement ring is so luxurious ! It ______ have cost a fortune.

A. must

B. might

C. will

D. should

6. You ______ to write them today.

A. should

B. must

C. had

D. ought

7. Unless he runs, he______ be able to catch the train.

A. will

B. mustn’t

C. wouldn’t

D. won’t

8. When _____you come back home?

A. will

B. may

C. might

D. maybe

9. You won’t leave the room. _____ you ?

A. may

B. must

C. will

D. could.

Đáp án: 

1. A
2. C
3. B
4. B
5. A
6. D
7. D
8. A
9. C

Bài tập 3: Viết lại các câu sau đây sao cho nghĩa không đổi.

1. Perhaps Susan knows the address. (may)

=> Susan______________________________________________

2. It’s possible that Joanna didn’t receive my message. (might)

=> Joanna ______________________________________________

3. The report must be on my desk tomorrow. (has)

=> The report ______________________________________________

4. I managed to finish all my work. (able)

=> I______________________________________________

5. It was not necessary for Nancy to clean the flat. (didn’t)

=> Nancy______________________________________________

Đáp án: 

1. Susan may know the address.

2. Joanna might not have received my message.

3. The report has to be on my desk tomorrow.

4. I was able to finish all my work.

5. Nancy didn’t need/have to clean the flat.

Bài tập 4: Trong những câu sau đây, có một số câu chính xác và một số câu chứa một lỗi sai.

Nếu câu đó đúng, hãy đánh dấu , nếu câu đó sai, hãy tìm và sửa lỗi sai đó.

1. You must have be surprised when you heard the news.

2. You needn’t have do all this work.

3. The window must have been broken on purpose.

4. You must tired after working so hard.

5. One of the men may have died on the mountain.

6. You must been driving too fast.

7. The thief must have come in through the window.

8. If he is not in the office, then he must at home.

Đáp án: 

1. be => been

2. do => done

3. Đúng

4. must => must be

5. Đúng

6. must been => must have been

7. Đúng

8. must => must be

Bài tập 5: Hoàn thành các câu sau: 

1. I __________ (pay) any money at the museum. It was free to enter.

2. Sheila __________ (walk) to the party. I would have given her a lift in my car.

3. Oh Mike, you __________ (buy) me anything for my birthday! A simple card would have been perfectly acceptable.

4. Today was the last day of school and we __________ (attend) classes in the afternoon.

5. We went for a lovely walk in the woods yesterday. We took a huge picnic with us but there was a café there anyway. We __________ (take) anything!

6. Our boss told us we had an extra three days to finish the project so we __________ (work) so hard.

7. The car wasn’t dirty. You __________________ (wash) it.

8. You __________ (say) anything to Carla about the broken vase. She understood what had happened anyway.

9. It was my day off yesterday, that’s why I __________ (get up) early.

10. It started raining heavily so I ____________ (water) the flowers.

11. When the party was over, I realized that you __________ (cook) so much food as most of it was untouched.

12. You _______________________ (buy) me a newspaper. I’ve already got one!

Đáp án: 

1. didn't need to pay
2. needn't have walked
3. needn't have bought
4. didn't need to attend
5. needn't have taken
6. didn't need to work
7. needn't have washed
8. needn't have said
9. didn’t need to get up
10. didn’t need to water
11. needn’t have cooked
12. needn't have bought

Bài tập 6: Grammar Exercise: "Needn't Have" or "Didn't Need To" Worksheet

1. I  (go) to work today but I went as I knew they were really busy on this new contract.

2. I  (take) any money to the museum - I didn't realise it was free to enter.

3. Sheila  (got) a taxi to the party. I would have given her a lift in my car.

4. Oh Mike, you  (buy) me anything for my birthday! A simple card would have been perfectly acceptable.

5. Today was the last day of school and we  (attend) classes in the afternoon.

6. We went for a lovely walk in the woods yesterday. We took a huge picnic with us but there was a café there anyway. We  (take) anything!

7. Our boss told us we had an extra three days to finish the project so we  (work) so hard.

8. You  (say) anything to Carla about the broken vase. She understood what had happened anyway.

Đáp án: 

1.  didn't need to go.
2. needn't have taken.
3. needn't have got.
4. needn't have bought.
5. didn't need to attend.
6. needn't have taken.
7. didn't need to work.
8.  needn't have said.
9. didn't need to pa

Bài 7: Nối 2 nửa câu lại, sao cho chúng phù hợp về mặt nghĩa.

1. You look sick today.
2. I almost failed my test.
3. When I was a child,
4. I would have helped you with your homework,
5. My mother wasn’t at home this morning.
6. My brother can’t have cooked this lunch.
7. We could have watched action film last night
8. Our teacher has not told us the results yet.
9. You needn’t have cooked dinner today.
10. The room is too hot.
11. my mother would take me to school every day.
12. I think you should see a doctor.
13. but you didn’t ask me.
14. but our children preferred cartoons.
15. I already bought 2 pizzas.
16. I should have reviewed my lesson more carefully.
17. Could you open the window, please?
18. He doesn’t know how to cook.
19. She must have been at work because today is Monday.
20. She might not have finished marking our tests.

Đáp án: 

 1b, 2f, 3a, 4c, 5i, 6h, 7d, 8j, 9e, 10g.

Bài 8: Chọn perfect modals thích hợp nhất trong câu.

1. The student should have / could have finished the national test by now.
2. My colleague looks exhausted. She must have / should have worked hard all day.
3. If people had been more aware of environment protection, many animals wouldn’t have / can’t have gone extinct.
4. You might not have / need not have done that assignment today. Our professor already gave us the answer keys for it.
5. Ben can’t have / couldn’t have been at John’s home last night. I was there all the time but I didn’t see Ben.

Đáp án:

1. Should have

2. Must have

3. Wouldn’t have

4. Need not have

5. Can’t have.

Bài 9: Dựa vào ngữ cảnh của đề bài, đặt câu với perfect modals cho sẵn.

1. I can’t find my phone. Do you know where I put it, mom? (might have)
2. => You _________________________________________________________.
3. Kevin has just received his final test results. He was depressed because he failed the test. (should have)
4. => Kevin _________________________________________________________.
5. I didn’t buy that T-shirt because I didn’t bring enough money last night. (would have)
6. => If I _________________________________________________________.
7. Mike has just broken up with his girlfriend. He was also made redundant at work. (must have)
8. => Mike _________________________________________________________.
9. I spent two hours on preparing my outfit for the party just to know that it was cancelled in the last minute. (needn’t have)
10. => I _________________________________________________________.

Bài 10: Chia động từ phù hợp cho câu

1. Jenny needs (work) ____ harder if she want to promote.
2. John needs (go) ____ to the school tomorrow.
3. Anna needs (change) ____ her dress.
4. This living room hasn’t been cleaned for weeks, it needs (clean) ____ tonight.
5. This tree needs (water) ____.
6. Peter doesn’t need (come) ____ to the meeting.
7. Harry’s hair is dirty, it needs (wash) ____ now.

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