Confuse to using "be" or "do" verb

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Feb 11, 2020 21:10
Confuse to using "be" or "do" verb
I 'm studying English grammars now.
I confuse to use "be" or "do)", especially question sentence.
I think "is" using for state, and "do" using for action.
But I'm not sure which one is the correct sentence like these.
Is your mother cook?
Do your mother cook?
Could you help me what is different "be" and "do" clearly?