need的情态动词和实意动词什么时候用实意动词,什么时候用他的情态动词

问题描述:

need的情态动词和实意动词
什么时候用实意动词,什么时候用他的情态动词

need to do something
needsomething
这是实意动词,意为需要干某事或需要某物
you needn't do it now.
是情态动词,其后跟动词原形

need to do 需要做某事 (实意动词)
need do 有必要做 needn't do 没有必要做 (情态动词)

在肯定句中用实意动词,疑问句和否定句中随便用.例如:You need to hand in your homework tomorrow.Do you need to hand in your homework tomorrow?Need you hand in your homework tomorrow?You don't need to han...