got is past tense of get and thats it. Use it for no other purpose. there is nothing like have got, got sick etc. These are examples of popular mistakes, often by not so educated class. I gotta go= I got to go = i have to go. The first one is a phonetic spelling i.e. spell like it sounds to the ear, second one is actual spelling. But both are wrong. The third one is correct. AVOID using gotta, notta, hafta like I keep on telling every student. Hope this helps. :)

hi as I know "gotta" means "have got to" or "have got a". like: He's gotta be kidding. (he has got to be kidding) Gotta (= have you been got a) cigarette? or even your example, I gotta go now (I have got to go now). :)

Hi Bobi. Yes, this is not grammatically correct. "I gotta go" is the phonetic spelling for "I got to go", which is also not grammatically correct. People say it all the time. It is not rude or offensive, just incorrect. It means "I have to go", which is sometimes phonetically spelled, "I hafta go".

Got is used in many illogical cases, but in this case it is the phrase "I have got to" which means exactly the same as "I have to" (it's a necessity or obligation). There is no reason for putting "got" in there, it's just a more colloquial way of saying the same thing. It can't be used in the past, you'd have to say, "I had to". "I gotta" is a lazy, mainly American way of saying "I've got to" and of course is grammatically incorrect. Don't forget that most languages have two versions! The "good" one that will help you pass your exams, and the colloquial one that many people use every day. There is nothing wrong with that, it's just part of the richness of language, and what makes it so fascinating! (By the way, "I get to go" does have a colloquial meaning, but it's different. It means "I have the opportunity to go". E.g. "If I get to go to Paris, I'll visit the Eiffel Tower".)