预习导航

　　一、请用下列情态动词造句

　　1．ought to/oughtn't to

　　________________________________________________________________________

　　2．should/shouldn't

　　________________________________________________________________________

　　3．mustn't

　　________________________________________________________________________

　　4．needn't

　　________________________________________________________________________

　　5．don't have to

　　________________________________________________________________________

　　6．will

　　________________________________________________________________________

　　7．can/can't

　　________________________________________________________________________

　　二、用ought to，have to，need，mustn't完成句子

　　1．你不应当在外面待到这么晚。

　　You ____________ stay out so late.

2．我们不必告诉他那件事情。