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Bài viết 100 Bài tập must, mustn't và needn't có đáp án chi tiết giúp bạn có thêm nguồn bài tập tự luyện để nắm vững cách sử dụng must, mustn't và needn't từ đó giúp bạn học tốt Ngữ pháp Tiếng Anh hơn.

100 Bài tập must, mustn't và needn't có đáp án

Bài tập must, mustn't và needn't (phần 1)

Bài 1: Complete the sentences using needn't + the following verbs:

ask    come    explain    leave    tell    walk

1. We've got plenty of time. We needn't leave yet.

2. I can manage the shopping alone. You .... with me.

3. We .... all the way home. We can get a taxi.

4. Just help yourself if you' d like more to eat. You .... first.

5. We can keep this a secret between ourselves. We .... anybody else.

6. I understand the situation perfectly. You .... further.

Đáp án & Hướng dẫn:

2. needn't come

3. needn't walk

4. needn't ask

5. needn't tell

6. needn't explain

Bài 2: Complete the sentences with must, mustn't or needn't

1. We haven't got much time. We must hurry.

2. We've got plenty of time. We needn't hurry.

3. We have enough food at home, so we .... go shopping today.

4. Gary gave me a letter to post. I .... remember to post it.

5. Gary gave me a letter to post. I .... forget to post it.

6. There's plenty of time for you to make up your mind. You .... decide now.

7. You .... wash those tomatoes. They've already been washed.

8. This is a valuable book. You .... look after it carefully and you .... lose it.

9. A: What sort of house do you want to buy? Something big?

B: Well, it .... be big- that's not so important. But it .... have a nice garden-that's essential.

Đáp án & Hướng dẫn:

3. needn't

4. must

5. mustn't

6. needn't

7. needn't

8. must .... mustn't

9. needn't .... must

Bài 3: Read the situations and make sentences with needn't have.

1. Paul went out. He took an umbrella because he thought it was going to rain. But it didn't rain.

He needn't have taken an umbrella.

2. Linda bought some eggs when she went shopping. When she got home, she found that she already had plenty of eggs.

She ....................

3. A colleague got angry with you at work. He should at you which you think was unnecessary.

Later you say to him: You ..........................

4. Brian had money problems, so he sold his car. A few days later he won some money in a lottery.

He .......................

5. We took a camcorder with us on holiday, but we didn't use it in the end.

We ........................

6. I thought I was going to miss my train, so I rushed to the station. But the train was late and in the end I had to wait twenty minutes

I ..................................

Đáp án & Hướng dẫn:

2. She needn't have bought eggs

3. You needn't have shouted at me.

4. He needn't have sold his car.

5. We needn't have taken the camcorder

6. I needn't have rushed

Bài 4: Write two sentences for each situation. Use needn't have in the first sentence and could have in the second.

1. Why did you rush? Why didn't you take your time? You needn't have rushed. You could have taken your time.

2. Why did you walk home? Why didn't you take a taxi. ................................

3. Why did you stay at a hotel? Why didn't you stay with us. ................................

4. Why did she phone me in the middle of the night? Why didn't she wait until the morning. ................................

5. Why did you leave without saying anything? Why didn't you say goodbye. ................................

Đáp án & Hướng dẫn:

2. You needn't have walked home. You could have taken a taxi.

3. You needn't have stayed at a hotel. You could have stayed with us.

4. She needn't have phoned me in the middle of the night. She could have waited until the morning

5. You needn't have left without saying anything. You could have said goodbye.

Bài tập must, mustn't và needn't (phần 2)

Bài 1: Complete the sentences using needn't + the following verbs:

ask come explain leave tell walk

1. We've got plenty of time. We needn't leave yet.

2. I can manage the shopping alone. You .... with me.

3. We .... all the way home. We can get a taxi.

4. Just help yourself if you' d like more to eat. You .... first.

5. We can keep this a secret between ourselves. We .... anybody else.

6. I understand the situation perfectly. You .... further.

Đáp án & Hướng dẫn:

2. needn't come

3. needn't walk

4. needn't ask

5. needn't tell

6. needn't explain

Bài 2: Complete the sentences with must, mustn't or needn't

1. We haven't got much time. We must hurry.

2. We've got plenty of time. We needn't hurry.

3. We have enough food at home, so we .... go shopping today.

4. Gary gave me a letter to post. I .... remember to post it.

5. Gary gave me a letter to post. I .... forget to post it.

6. There's plenty of time for you to make up your mind. You .... decide now.

7. You .... wash those tomatoes. They've already been washed.

8. This is a valuable book. You .... look after it carefully and you .... lose it.

9. A: What sort of house do you want to buy? Something big?

B: Well, it .... be big- that's not so important. But it .... have a nice garden-that's essential.

Đáp án & Hướng dẫn:

3. needn't

4. must

5. mustn't

6. needn't

7. needn't

8. must .... mustn't

9. needn't .... must

Bài 3: Read the situations and make sentences with needn't have.

1. Paul went out. He took an umbrella because he thought it was going to rain. But it didn't rain.

He needn't have taken an umbrella.

2. Linda bought some eggs when she went shopping. When she got home, she found that she already had plenty of eggs.

She ....................

3. A colleague got angry with you at work. He should at you which you think was unnecessary.

Later you say to him: You ..........................

4. Brian had money problems, so he sold his car. A few days later he won some money in a lottery.

He .......................

5. We took a camcorder with us on holiday, but we didn't use it in the end.

We ........................

6. I thought I was going to miss my train, so I rushed to the station. But the train was late and in the end I had to wait twenty minutes

I ..................................

Đáp án & Hướng dẫn:

2. She needn't have bought eggs

3. You needn't have shouted at me.

4. He needn't have sold his car.

5. We needn't have taken the camcorder

6. I needn't have rushed

Bài 4: Write two sentences for each situation. Use needn't have in the first sentence and could have in the second.

1. Why did you rush? Why didn't you take your time? You needn't have rushed. You could have taken your time.

2. Why did you walk home? Why didn't you take a taxi. ................................

3. Why did you stay at a hotel? Why didn't you stay with us. ................................

4. Why did she phone me in the middle of the night? Why didn't she wait until the morning. ................................

5. Why did you leave without saying anything? Why didn't you say goodbye. ................................

Đáp án & Hướng dẫn:

2. You needn't have walked home. You could have taken a taxi.

3. You needn't have stayed at a hotel. You could have stayed with us.

4. She needn't have phoned me in the middle of the night. She could have waited until the morning

5. You needn't have left without saying anything. You could have said goodbye.

Ngữ pháp must, mustn't và needn't

1. Cách sử dụng Must và Mustn't

You must do something = bạn cần phải làm gì

Ví dụ:

• You must keep the contract a secret.

Bạn phải giữ bí mật về hợp đồng này.

• There isn’t enough time for us to have a substantial meal. We must hurry up.

Chúng tôi không có đủ thời gian để ăn một bữa no nê. Chúng tôi phải nhanh chân lên.

• I can’t carry the luggage by myself. My husband must help me.

Tôi không thể tự mang hành lý. Chồng tôi phải giúp tôi.

You mustn’t do something = bạn không cần phải làm một điều gì

Ví dụ:

• You mustn’t tell anyone about the contract, even your family.

Bạn không được nói cho ai về hợp đồng, kể cả gia đình bạn.

• We mustn’t make any noise in order to not wake the baby up.

Chúng tôi không được làm ồn để không đánh thức em bé.

2. Cách sử dụng Needn't

You needn’t do something = bạn không cần phải làm gì

Ví dụ:

• You can come to the party but in fact if you are busy, you needn’t attend it.

Bạn có thể tới bữa tiệc nhưng nếu bạn bận, bạn không cần tới.

• They are having a day off. They needn’t get up early in the morning.

Họ đang có một ngày nghỉ. Họ không cần dậy sớm vào buổi sáng.

• I can understand everything the lecturer said in the class. You needn’t explain it to me.

Tôi có thể hiểu được mọi thứ giảng viên nói trong lớp. Bạn không cần giải thích với tôi.

Needn’t có thể được thay thế bằng do not need to do something.

Ví dụ:

• We needn’t wake up early in the morning.

= we don’t need to wake up early in the morning.

Chúng tôi không cần dậy sớm vào buổi sáng.

• We have lots of foods in the refrigerator so we don’t need to go to the grocery store to buy some.

= We have lots of foods in the refrigerator so we needn’t go to the grocery store to buy some.

Chúng tôi có rất nhiều đồ ăn trong tủ lạnh nên chúng tôi không cần phải tới cửa hàng tạp hoá để mua thêm.

Ghi nhớ: needn’t + do trong khi don’t need + to do và do not need to do cũng có ý nghĩa tương tự như don’t have to do something.

Ví dụ:

• We don’t have to go to school on Independence Day.

= we needn’t go to school on Independence Day.

= we don’t need to go to school on Independence Day.

Chúng tôi không phải đi học vào ngày Quốc Khánh.

• It didn’t rain so we don’t need to bring a raincoat with us.

= It didn’t rain so we needn’t bring a raincoat with us.

= It didn’t rain so we don’t have to bring a raincoat with us.

Trời không mưa nên chúng tôi không cần mang áo mưa.

Xem thêm bài tập ngữ pháp Tiếng Anh có đáp án chi tiết hay khác:

• Bài tập Cách sử dụng Should
• Bài tập Had better & Cấu trúc It's time
• Bài tập Cách sử dụng Would
• Bài tập Lời yêu cầu, Lời mời, lời đề nghị
• Bài tập Câu điều kiện loại 1 và loại 2
• Bài tập Cấu trúc I wish
• Bài tập Câu điều kiện loại 3

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