No, English words, auxiliary verbs, mean no. The full form is no. Don't [English] [No? d？ Znt][ America] [? d？ Znt] is the triple conjunction form of don, and the negative form of does DOES not = DOES? No.

No is its past tense, no = no. Note: do is the third form of do. The same: not done = not done, should not = should not = should not = will not.

Positive form

Subject+verb past tense+others

She often comes to help us these days.

negative form

Subject+no+predicate verb prototype+others

①was/were+not； ② Add not before the action verb and restore the action verb at the same time.

Example: I didn't know you liked coffee.

Baidu encyclopedia-past tense