After 'never'.

Hi,
Welcome to the Forum.

I'm very confused of the use of never. 'Never' explains that something we don't do at all. So that's mean it is a future tense. No, no, no.

I was wondering, after 'never' is simple past tense or just present tense?

These examples are all fine.
1. When I was a child

tankshe'Never' explains that something we don't do at all. So that's mean that means it is a future tense.

No. never is not a verb, so it doesn't have any tense.

never means 'at no time' within the time period expressed by the verb tense that goes with it. Study Clive's examples, and note t

John never does homework.
John has graduated, but he never did any homework while he was a student.
John has never done any homework since he began my class.
John will probably never amount to anything.
John is never going to do any homework, so why bother assigning it to him?

All are grammatically correct. I'm glad I'm not John's teacher.

So the tenses after 'never' is depending on what tenses is in front of it, right?

No, wrong.
Consider, for example, Tom never eats fish.

Would you please tell me, which sentence is correct:

It hasn't rained for two months.

It has never rained for two months