I don't know do you have time.这句话对吗?快!

I don't know do you have time.这句话对吗?快!
I don't know do you have time.这句话对吗?快!

I don't know do you have time.这句话对吗?快!
I don't know whether you have time or not.

I don't know if you have time?

how many times have you done do well in the exam, can’t I study English by memorizing grammarhave you done it? 这句话的意思