We use it for EX with أنت أنا أنت ها أنت ذا = there you are ها أنا ذا = here I'm or it may also mean ها قد جئت : finally you came

I think you should write an example. However, I think I understood your question. You mean هـ on some dialect it used as a prefix for future tense. Originally this prefix should be س which is a short cut for سوف will. for example سوف اذهب ساذهب both have same meaning, I will go. On my dialect we use ح.

According to the sentence ^^