Do,does,did what are it used?

Dear Student

Do, does and did are auxiliary verbs. As a verb, we use this as 'to do'. Do and does is used for present tense while did is used for past tense. Do is used with I / you / we / they whereas does is used with he / she / it. 

Examples - I do this everyday.
You do your work.
We do our homework.
They do the gardening.

He does the cleaning.
She does the cooking.
It does not work.

Did, on the other hand, is used for past tense. It is used with I / you / he / she / it / we / they.

Examples - I did my work yesterday.
You did not forget about it.
He did not buy the toy.
We did not go there.

Regards.