When I was five, I _______ (can/ could) swim really well.
could
I think you _________ (must/ should) tell David the truth.
should
You __________ (are able to/ should) drink some water. You look thirsty.
should
I'm sorry, but you __________ (can't/ couldn't) leave your car here.
can't
John lives in Tokyo but he _________ (can/ can't) speak Japanese.
can't
__________ (Can/ Must) I ask a question? I don't understand.
Can
________ (Do I have to/ May I) use your phone, please?
May I
The car looks nice. It ________ (might/ mustn't) be expensive.
might
You have been working all day. You _________ (can/ must) be tired.
must
I think I'm sick. _________ (Should/ Shouldn't) I see the doctor?
Should
It's raining. You ___________ (mustn't/ don't have to) water the flowers.
don't have to
Maria _________ (can/ can't) speak Spanish fluently. She's only been here for 3 days.
can't
