Have or without

Anonymous Is have never' present perfect

Yes.

AnonymousWhat is the difference between using have and not?

It is the same as with the affirmative sentences. Read this in our FAQs:

Thanks. That was very helpful.
I see the differences but in my sentences their is not much and both are possible, right?

I mean I can see how they can be used differently, but in terms of what I am trying to say either one would be correct?

Also, the use of 'have' (present perfect) is more in the present?

Is what I explained correct?

Dear teacher, I would greatly appreciate it if you confirm my last post. I would like to know if it is correct to write either sentence just as they are. Also, I know that both can be used differently as explained in the helpful link you provided. But, would either one be correct if just written as they are?

Finally, the present perfect is more to the present and it would not refer to the