嘉哉(よしや) 的回答不错, 只是 2 be gonna 不太对...be gonna 这两个单词不能放在一起. gonna = going to "am" 可以的

All contractions were, at some point in history, slang. The older ones are now considered proper English, but there are some newer ones that people learning English are not often taught. Contractions are optional, so it's OK if you never use any of these slang contractions. But, people who only speak English sometimes forget that they need to speak carefully so that you can understand them. Sometimes they may use slang without realizing it, so it's a good idea to learn slang along with proper English. In writing, these slang contractions do not usually appear. There are only two common cases when they do: When someone is writing about what a person said with their voice, and during online chats. "Going to" is often contracted to "gonna". - "I'm going to go to the store." - "I'm gonna go to the store." However, you can only use this contraction with "going to (verb)". "I'm going to New York tomorrow" can NOT be contracted to "I'm gonna New York tomorrow." You must have a verb! For example, "I'm gonna fly to New York tomorrow" is OK. Another contraction is "gotta", which comes from "got to". "Got to" can either mean "need to" or "reached". "I've got to exercise." (need to) "I was playing a video game and got to level 5." (reached) "Gotta" can only be used when you mean "need to": "I've got to meet a friend this afternoon." "I've gotta meet a friend this afternoon." Taken from here, copyrights are not mine ;)) http://lang-8.com/?m=pc&a=page_fh_diary&l=en&target_c_diary_id=18722&comment_count=5

1, wanna = want to 2, be gonna = be going to 3, gotta = have to (or: have got to / British English, got to / American English) 4, ain’t (illiteracy's English) = is not, are not, has not, have not, do not, does not, did not

The biggest difference is the level of education of the speaker!!!

谢谢汉伦，我当时担心有人把gonna=going to和going to(somewhere)混为一谈，所以故意加上了be用来区分。