The thief knew the secret code. It ....................... have been someone who works here.
must
Rewrite the following sentence: "It was a mistake to leave my valuables in the hotel room". I ...........................my valuables in the hotel room.
shouldn't have left
Rewrite the following sentence: "We were ordered to empty our pockets before we could go into the concert". We ........................ to empty our ....
had
The past of the modal verb "can" is ...
could
Rewrite the following sentence: "It's possible that they forgot to turn on the alarm". They ...................to turn on the alarm.
may/might/could have forgotten
The police ................................ find any evidence (NOT BE ABLE TO in the past)
weren't able to
I'm sure he ......................... be at home. He leaves work at 5 and it's 4 o'clock.
can't/cannot
We had .................. check that the doors are locked before we go out.
better
Rewrite the following sentence: "It's certain that the thieves knew where the jewellery was". They ....................................... where the jewellery was.
must have known
2 modals expressing "ability" in the present
can, be able to (is, are, am able to)
When the police arrest someone, they ............................. to spend a lot of time filling in forms.
have/need
4 modal verbs to ask for permission
can, could, may, might
3 modals expressing "possibility"
may, might and could
You ......................... have taken your expensive watch on a camping holiday. It was very risky.
shouldn't
3 modals expressing "advice"
should, ought to and had better
Rewrite the following sentence: "Is it OK if I take a picture of your notes?" .............. I take a picture of your notes?
can, could, may, might
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