Modal verbs

Rewrite the sentences using modal verbs.

1. Possibly she isn’t John’s sister.
2. Perhaps we will go on a pilgrimage next month.
3. She was able to read when she was two.
4. It is not necessary for you to pay the bill.
5. I am certain that they have already left.
6.  It was not necessary for them to buy a new car but they bought it.
7. It is probable that he will pass his driving test easily.
8. Perhaps he forgot to bring the book.
9. Nobody answered the phone; perhaps they have gone out.
10. I am certain that he is over sixty.