Question

II. Remove the wrong variant of the modal verb or their equivalent. 1. You are not to / mustn't sleep at lectures. It's impolite. 2. I live in the suburbs. I must / have to take a train every day. 3. You may / can stay here as long as you can. I don't mind. 4. Even if you want to see him you shouldn't / needn't call on him now. 5. It's not your fault. You shouldn't / needn't apologize. 6. Alice can't ride well. She must have had / could have had little practice. 7. Carrie expects them today. They mustn't have gone / can't have gone to a show. 8. Can they have forgotten / may they have forgotten about the party? 9. I don't know where they are. They can be / may be on holiday in Switzerland. 10. It's so hot. The ice-cream should have melted / must have melted.

Answer 1

1. You mustn't sleep at lectures. It's impolite. 2. I live in the suburbs. I have to take a train every day. 3. You can stay here as long as you can. I don't mind. 4. Even if you want to see him you shouldn't call on him now. 5. It's not your fault. You needn't apologize. 6. Alice can't ride well. She must have had little practice. 7. Carrie expects them today. They can't have gone to a show. 8. Can they have forgotten about the party? 9. I don't know where they are. They may be on holiday in Switzerland. 10. It's so hot. The ice-cream must have melted.

Answer 2

Here are the corrected sentences with the wrong variants removed:

1. You mustn't sleep at lectures. It's impolite.
2. I live in the suburbs. I have to take a train every day.
3. You may stay here as long as you can. I don't mind.
4. Even if you want to see him, you needn't call on him now.
5. It's not your fault. You needn't apologize.
6. Alice can't ride well. She must have had little practice.
7. Carrie expects them today. They can't have gone to a show.
8. Can they have forgotten about the party?
9. I don't know where they are. They may be on holiday in Switzerland.
10. It's so hot. The ice-cream must have melted.

Answer 3

Here are the corrected sentences with the appropriate modal verbs:

1. You mustn't sleep at lectures. It's impolite.
2. I live in the suburbs. I have to take a train every day.
3. You can stay here as long as you want. I don't mind.
4. Even if you want to see him, you needn't call on him now.
5. It's not your fault. You needn't apologize.
6. Alice can't ride well. She must have had little practice.
7. Carrie expects them today. They can't have gone to a show.
8. Can they have forgotten about the party?
9. I don't know where they are. They may be on holiday in Switzerland.
10. It's so hot. The ice-cream must have melted.