dare用作情态动词时，表示“敢于”这个意思，主要用于疑问句、否定句及条件从句。
【例如】
dare you go home alone?
tom dare not gosintosthe haunted house.
how dare you say such a thing to your father!
i won’t allow you to swim across the river, even if you dare do it. the current is too swift.
但在现代英语中dare，need一样用作及物动词的时候更多一些，后面可以跟不定式，用于各种结构中。
【例如】
does tom dare to gosintosthe haunted house?
i have never dared to tell him about it.
she stopped at door, not daring to enter.
if you dare to say "no", i will beat you.
he didn’t dare to do it because he was under inspection.