Complete the following sentences using appropriate auxiliary verbs.

1. Alice ……………….. have a problem. She is crying. (certainty)

2. There is the doorbell. Who ……………… it be? (possibility)

3. Plants ………………… get enough light and water. (necessity)

4. A woman phoned while you were out. It …………….. have been Kate. (conclusion about past)

5. Why ……………… you always leave the door open?

6. All employees ……………….. work from nine to five. (necessity)

7. I ………………… see you again. (weak possibility)

8. They knelt in front of the child who ………………… one day rule their country. (certainty)

9. Chennai ………………. be very warm in June. (possibility)

10. He ……………… arrive any time. (possibility)

Answers

1. Alice must have a problem. She is crying. (certainty)

2. There is the doorbell. Who can it be? (possibility)

3. Plants must get enough light and water. (necessity)

4. A woman phoned while you were out. It must have been Kate. (conclusion about past)

5. Why do / must you always leave the door open?

6. All employees must work from nine to five. (necessity)

7. I might see you again. (weak possibility)

8. They knelt in front of the child who would one day rule their country. (certainty)

9. Chennai can be very warm in June. (possibility)

10. He may arrive any time. (possibility)