情态动词、连词

The children _________ play football on the road.

• may not

• mustn't

• needn't

Answer explanation

mustn't 不能，不可（must not 的缩写）表示禁止

He can ______ you some water.

• gives

• giving

• give

Answer explanation

情态动词后加动词原形

—Must we do our homework first?

         —No, you ________. You may have a rest first.

• mustn't

• needn't

• can't

Answer explanation

must提问的否定回答：needn't或don't have to

—Must I be home before eight o'clock, Mum？

                —No, you ________. But you must come back before ten.

•  needn't

• can't    

• mustn't

Answer explanation

must提问的否定回答：needn't或don't have to

—Must we finish it now?

         —No, you ________.

• mustn't

•  don't have to

• can't

Answer explanation

must提问的否定回答：needn't或don't have to

The man in red _______ be Jim.

• can't

• mustn't 

• needn't

Answer explanation

can't（表示推测）不可能

The man in red _______ be Jim.

• can't

• mustn't

• needn't

Answer explanation

can't (表示推测)不可能

Match.

• （表示推测）不可能

• can't

• 不必；没必要

• mustn't

• （表示禁止）不能，不可

• needn't / don't have to

—I think the man over there must be Bob.

        —It ________ be him. He is in Australia now.

• can't

• mustn't 

• can

Answer explanation

can't (表示推测) 不可能

—Look! Sally is in the classroom.

        —It ________ be her. She's always the first one to get here.

• must

• can

• can't

Answer explanation

must (表示推测) 肯定