Ex3.

1. Have to

2. Musn't

3. Must

4. Musn't

5. Musn't

6. Musn't

7. Have to

8. Have to

Ex1.

1. Should

2. Couldn't

3. Ought to

4. Might

5. Can

6. May

7. Will

8. Must

Ex2.

1. Must

2. Shouldn't

3. Don't have to

4. Needn't

5. Mustn't

6. Don't have to

7. Must

P/s: Đ/á chỉ mang tính chất tham khảo, có sai sót về ngữ pháp hay từ vựng,... mong các bạn bỏ qua và góp ý để mình hoàn thiện hơn. Thank you~

Ex 1:

1. You should tell me the truth for your own good.

2. I couldn't find my shoes anywhere.

3. We must arrive on time or else we will be in trouble.

4. He may shoot the basketball at the rim.

5. Will you let me know the time?

6. They might not be trustworthy enough.

7. Can you please pass the salt?

8. We ought to prepare for the big exam.

Ex 2:

1. You must be 18 before you can drive in Spain.

2. You shouldn't go to bed too late. It's not good for you.

3. You don't have to wear school uniform in most Spanish state schools.

4. You needn't come. I can do without you.

5. You mustn't copy during exams.

6. You don't have to be very tall to play football.

7. You must be a good writer to win the Pulitzer Prize.

Ex 3:

1. Brilliant! I don't have to study tonight because I've finished my exams.

2. You mustn't use a mobile phone on a plane.

3. You can go out, but you have to be home by midnight.

4. Jo doesn't have to go to school by bus. She lives nearby.

5. We don't have to cook tonight. We can get a pizza.

6. She doesn't have to get up early. She's on holiday.

7. You have to study harder or you are going to fail.

8. You mustn't drive faster than 120 km/h on the motorway.