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 go into the 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 go into the 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.