Meaning of do in English
auxiliary verb
1. used with another verb to make a question
Do you speak Japanese?
Does she live in London?
She didn't come, did she?
You want to go with me, don't you?
2. used with ‘not’ to form the negative of main verbs
I don't play the piano.
She doesn't any sisters.
They didn't come.
Don't be stupid!
1. carry out; perform or deal with
Nothing can be done about that now.
He is doing very well in his business.
3. work at for a living; have a job
What do you do? ー What's your occupation?
She's doing physics at Cambridge University.
I can't do this mathematics problem.
I have done my homework.
7. bring about a result; cause or result in
It does little good to complain.
8. be good enough; be suitable or acceptable
That will do.
9. act in a certain way, especially towards others; behave
He did like a baby.