You _____ sit down if you want.
must
can/may
He _____ run faster when he was younger
can
could
She _____ be at home.
can
may
It _____ have been lost forever.
might
may
He wasn't there last night. He _____ be busy.
may
might
She _____ dance very well.
might
can
You _____ not smoke in a lift.
might
may
_____ I help you with your luggage, madam?
May
Might
You _____ have finished earlier if you wanted.
could
might
He _____ take some rest if he is tired.
might
can/may
The students asked if they _____ go home early.
could
might
It _____ rain in the afternoon.
may
can
You _____ go home if you want to.
may/can
might
Although I tried hard, I _____ solve the problem.
could not
cannot
Thanks. You _____ be the best person I have ever known.
may
might