dare什么时候是实义的,什么时候用做情态动词
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dare的用法

1) dare用作实义动词,此时其后的动词不定式可带to也可不带to,且dare有人称和数以及时态的变化.例如:

I dare to jump down from the top of the wall.我敢从那墙头上跳下来.

She doesn't dare (to) meet her teacher's eyes.她不敢与老师对视.

2) dare用作情态动词,后跟动词原形,主要用于疑问句、否定句和条件句中.例如:

How dare she do things like that to me?她怎么敢对我做那种事?

If you dare say that to our teacher,I would vote for you.如果你敢向我们的老师说那件事,我就投你一票.

我再强调下:那个dare是情态动词时,主语是she/he时,dare没有数的变化~