American street language

I have to go (as a matter of fact, I have to go)

I have to pee. I have to pee.

Who has that? Who has that thing?

I don't talk. I won't say anything.

I won't do that. I won't do it.

I haven't finished (I'm not in these three sentences).

I haven't finished that, I haven't finished it.

I heard it, I saw it (equivalent to oh I saw it, you are you)

I see (this is continuous reading that I understand)

What's Watcha doing? What are you doing? This is what you do in spoken English, and spoken English becomes what you are doing.

How are you? How are you doing? (equivalent to how r u do, that is, how r u)

What's the matter? How are you doing? Or what are you doing? (generally used in black English, rarely used by white people)

What's the matter? Wat's up is a new usage invented by young black Americans.

The above is very authentic American spoken English. I don't know if you like it or not. If you have any questions, you can ask me. Good luck.