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Grammar
Modal verbs to express certainty and
possibility
Rewrite the sentences in italics using a modal verb:
might, may, could, must or can’t.

2. Deborah is looking a bit tired. Perhaps she’s working
too hard.
She.....................................
3.He never goes on holiday. I don’t suppose he earns
much.
He..............................
4. She is studying full-time and she has a job in a
restaurant. I imagine that’s very hard.
That............................
5 .That man’s quite young. He’s defi nitely not Claire’s
grandfather..
That..................................
6 .He’s just bought a new car and a yacht. He obviously
sold his business for a lot of money.
He...................
7. Andy and Sarah aren’t speaking to each other. I don’t
believe they’ve had another argument.
They another argument.
8 You seem very familiar. Perhaps we’ve met before.
We
9 She says she doesn’t like children. I’m sure she didn’t
have a happy childhood herself.
..............
10 I don’t know why she didn’t tell me she’d left her job.
It’s possible she thought I would be angry.
She...................