Choose the correct alternative
I'm not sure. I suppose they can't/might not know the answer.
might not
A: There's a lot of traffic. We can be a little late.
B: OK, see you later
A: There’s a lot of traffic. We could/may/might be a little late.
It's possible we'll be a few minutes late.
We ... .
We might be a few minutes late.
Your friend is late for a dinner at your house. She's been to your house before.
She can't be lost. She knows the way.
Could/Must he be lost? He's looking at his phone.
Could
A: Have you found your keys?
B: Not yet. But they must to be somewhere here.
B: Not yet. But they must be somewhere here.
Perhaps this is David's house, but I'm not sure.
This ... , but l'm not sure.
This might/may/could be David’s house, but I’m not sure.
You meet your friend outside on a freezing cold day and he's wearing only shorts and a T-shirt.
He must be freezing. / He can’t be comfortable. / He might / may be exercising or doing his laundry!
She seems be/to be happy - she's smiling.
to be
A: Sofia isn't here? I wonder why.
B: Well, it's possible she mustn't know about the meeting.
B: Well, it’s possible she might/may not know about the meeting.
I'm totally sure the café is near here.
The ... .
The café must be near here.
A family you don't know are standing outside the house next door. They have suitcases with them.
They might/could/may be our new neighbours. / They must be visiting the people next door.
They're wearing coats so it can't/must be cold there.
must
A: I don't might be able to go to the party.
B: Oh, that's a shame. It'll be fun!
A: I might not be able to go to the party.
It's possible Diana won't come to the meeting
Diana ... .
Diana might/may not come to the meeting.
A woman dressed in very smart clothes comes to your work and goes to your manager's office.
She must/may/might be coming for a job interview.
It's not very clear and they may not to be/be able to see the boat.
be
A: Is this Alice's phone?
B: I'm not sure, but it must be.
B: I’m not sure, but it could/might/may be.
Take an umbrella. Maybe it'll rain later.
Take an umbrella. It ... .
Take an umbrella. It might/may/could rain later.
You see some people singing on your street.
They must be happy. / They might/could be busking (= singing for money).