Thread: "been" usage

Do all verbs behave like that? I seen, I done, I tried (instead of I've tried).

It's not the verb which behaves in a certain way but the speaker who modifies his grammar in a certain way. Changes to grammar are common in spoken language. You can imagine it like language having different levels, called registers. You use one register to talk to your friends, one to talk to colleagues, one to talk to your boss etc. What is acceptable on one level may not be acceptable on another. Dropping the "have" from such forms is just one option, Chaika used "ain't" which can be used as a stand-in for any form of "be not" or "have not", and there are several other possibilities, some characteristical for certain groups of speakers, certain societal levels etc.