I'm hungry but I haven't got a snack. - You can...
eat my apple
Swimmers ... wear swimming caps on their heads.
must
My room is a mess and mum is coming home! - You must...
tidy it
Tennis players ... play for more than two hours. Please take breaks.
mustn't
You ... run on the stairs. Please walk.
mustn't
I have a test tomorrow, so I (can/must) study tonight.
must
The train is leaving in five minutes so we (must/mustn't) hurry!
must
I want to send an email but my computer is broken. - You can...
borrow my laptop
I'm meeting Stan at the station at 11am. - You mustn't...
be late
You (must/can) borrow my dictionary, but I want it back this evening.
can
We don't have any homework, so I (mustn't/can) play computer games this evening.
can
Mum doesn't know about the surprise party so you (mustn't/can) tell her!
mustn't
After dinner, you (must/mustn't) wash the dishes.
must