Dare/dare to means to have the courage or impudence to do something difficult or dangerous, or something you have no right to do.

The use of dare and dare to is similar to that of need and need to. Dare is a modal auxiliaryA helping verb used with main verbs to express mood, voice and tense. E.g.: I can't stand when I am disturbed. ("can", "am"), whereas in dare to "dare" functions as a main verbA verb that can express an action or state in itself. E.g.: John likes squash a lot. ("like").

How dare she criticise us?
I daren't think how many victims there are.
Do you dare to tell him what happened to his bike?
Don't you dare to interrupt me!

Note that when dare is used as a main verb, the to before the infinitive is often omitted:

I'd never dare (to) talk to my boss the way he does to his.

COULD + comparatives
Miscellaneous modal structures MAY + contrast clauses