Use of has, have, had

The words 'has' and 'have' are used as a main verb and auxiliary verb in the present tense. In either case, has is used for the third person singular: he, she, it. As for have, it's used for the third person plural and the first and second persons, singular and plural.

We use the verb had and the past participle for the past perfect: I had finished the work. The past perfect is used in the same way as the present perfect, but it refers to a time in the past, not the present

Examples:

I have a pen.
He has two books.
They have four copies.
Have we a car?
Zeus has one horse.
Millan has four horses.
Azmat has not a beautiful book.
Imran has two bats.
He has a motorcycle.
Have they time to go with us?
I have a pen to give you.
He had two books to give me.