how are we going to use the doesn't and didn't?

[Lyn]

please try to help me because im confused in using that term

[Sureshvemuri]

Does not:
Fish doesn't have legs (if this is a truth - applicable universally)
Does:
Does the website have 1000 pages?

Didn't:
Did you not have the Key with you?
Didn't you have the Key?

[Lyn]

ok i understand.thanks

[Prezbucky]

Fish don't have legs.
I don't have fins.
You don't like fish.

A fish doesn't have legs.
Wendy doesn't like fish.
My mother doesn't fish.

They didn't eat fish last night.
My family didn't eat enough fish last year.
That fish didn't eat anything yesterday.
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Billie Jean is not my lover. Hee.