Mastering English Modal Verbs and Sentence Structures

Common Examples of Modal Verbs in Sentences

1. She may have left her keys at home.
2. He can solve complex math problems easily.
3. You needn't have bought a gift.
4. They must have misunderstood the instructions.
5. We may use calculators during the exam.
6. I shouldn't have spoken to her like that.
7. He might not have heard the alarm this morning.
8. She can play the piano beautifully.
9. They didn't have to wait for us.
10. She must have completed the project by now.
11. They might have missed the train.
12. He had to finish the report by Friday.
13. We shouldn't have ignored his advice.
14. She could speak three languages fluently.
15. You needn't have called me so late.
16. They might not have received our message.
17. He must have known about the meeting.
18. We may leave early today.
19. I shouldn't have forgotten her birthday.
20. He could have won the competition.

Modal Verb Transformation Exercises

• 1. It was possible for him to solve the problem quickly. (could)
  He could have solved the problem quickly...
• 2. I think she forgot her wallet at home. (may)
  She may have forgotten her wallet at home...
• 3. It isn’t possible that they didn’t hear the alarm. (can't)
  They can't have missed the alarm.
• 4. Perhaps she has already left for the airport. (might)
  She might have already left for the airport...
• 5. I am sure he is enjoying his vacation. (must)
  He must be enjoying his vacation...
• 6. It would have been possible for them to reach the final if they had trained harder. (could)
  They could have reached the final if they had trained harder.
• 7. I think he got lost on the way to the restaurant. (may)
  He may have got/gotten lost on the way to the restaurant...
• 8. It isn’t possible that they know the answer. (can't)
  They can't know the answer.
• 9. Perhaps she will change her mind about the trip. (might)
  She might change her mind about the trip...
• 10. I am sure they have already arrived at the hotel. (must)
  They must have already arrived at the hotel.

Rewrite the Sentences Using an Appropriate Modal Verb

1. 1. It is necessary for you to submit your application before Friday.
   You have to / need to / must submit your application before Friday...
2. 2. It is not allowed to park here.
   You mustn't park here.
3. 3. I am certain she didn’t recognize you in the crowd.
   She can't / couldn't have recognized you in the crowd.
4. 4. When I was a child, I wasn’t able to swim.
   When I was a child, I couldn't swim.
5. 5. I suggest you see a doctor about your headache.
   You should see a doctor.
6. 6. It is important to follow the safety instructions.
   You should / must follow the safety instructions...
7. 7. I am certain he wasn’t at school yesterday; I saw him at the mall.
   He can't / couldn't have been at school yesterday...
8. 8. When I was younger, I wasn’t allowed to watch TV after 9 PM.
   When I was younger, I couldn't watch TV after 9 PM...
9. 9. My advice is that you apologize for what you said.
   You should apologize.
10. 10. If you want to improve your English, it’s a good idea to practice every day.
    You should practice your English every day if you want to improve.

Vocabulary