47.情态动词need 和dare
一.情态动词need:need只有在疑问句和否定句中可用作情态动词,表示“需要”:
need we answer this letter?
这封信我们需要回吗?
so i needn't tell him,need i?
所以我无需告诉他,对吧?
we needn't worry.
我们无需发愁。
you needn't have mentioned it.
这事你是不必提到的。
—need i come?
一yes,you must?
—我需要来吗?
一你一定要来。
need也可用作及物动词,这时可和不定式连用,可用于肯定句、疑问句和否定句:
we need to make preparations.
我们需要作准备。
does she need to be notified?
需要通知她吗?
you don't need to do it yourself.
这事你不必亲自去做。
二.情态动词dare:dare只在极少数情况下用作情态动词,主要用在疑问句、否定句及条件从句中,表示“敢”:
dare you go home alone?
你敢一个人回家吗?
she daren't even look at me.
她甚至不敢看我。
how dared they do such a thing?
他们怎么敢干这样的事?
no one dared speak of it.
没人敢谈起这件事。
i won't allow you to do it even if you dare do it.
就是你敢做我也不让你这样做。
在多数情况下dare都用作及物动词,和带to的不定式一起用:
we must dare to act.
我们要敢干。
the girl did not dare to go home alone.
这姑娘不敢一个人回家。
no one dared to suspect him.
没人敢怀疑是他。
who dares to jump over the stream?
谁敢跳过小溪?