We __________ eat fruit and vegetables. They are healthy foods. (should or shouldn't)
should
You ________ go to class late. Teacher will be angry! (must or mustn't)
mustn't
You __________ play with fire. (should or shouldn't)
shouldn't
John ________ swim. He hates water. (can or can't)
can't
What must he do?
He must do his homework.
I _________ run very fast. I'm the fastest girl in the class. (can, should or must)
can
You _________ keep quiet in the library. (must or mustn't)
must
It's cold. You __________ put on a coat and a scarf. (should or shouldn't)
should
What can Mary do?
She can play the piano.
Should he watch TV all day?
No, he shouldn't.
It's hot. You _________ open the window. (can, should or must)
should
Jill _________ drive. She's a taxi driver. (can or can't)
can
What should he do in the morning?
He should get up early.
You _________ throw rubbish around. (must or mustn't)
mustn't
What can't he do?
He can't ride a bike.
You __________ wear a helmet when riding a motorbike. (can, should or must)
must
What musn't Tom do?
Tom mustn't sleep in class.
Can elephants fly?
No, they can't.