For example, "gonna" is a short form of "going to". If you say "going to" very fast, without carefully pronouncing each word, it can sound like "gonna".
比如，“gonna”是“going to”（将要）的缩写形式。如果你非常快速地说“going to”，没有仔细地读每个单词，听起来就像“gonna”。
Please remember that these are informal contractions. That means that we do not use them in "correct" speech, and we almost never use them in writing. (If you see them in writing, for example in a comic strip, that is because the written words represent the spoken words or dialogue.) We normally use them only when speaking fast and casually, for example with friends. Some people never use them, even in informal speech.
请记住这些是非正式缩写形式。这意味着我们不在“正确的”言语中使用它们，几乎从不在书面中使用它们。（如果你在书面语中，比如连环漫画中，看到它们，这是因为这里的书面词句代表口语词句或对话。）通常我们只在快速随意说话时使用它们，比如跟朋友说话时。一些人从不使用非正式缩写形式，即使是在非正式言语中。
It is probably true to say that informal contractions are more common in American English.
可以说非正式缩写形式在美式英语中更常见。
Also note that, unlike normal contractions, we do not usually use apostrophes (') with informal contractions when written.
也请注意，我们在书面中使用非正式缩写形式时通常不使用缩写号，这与书面中正式缩写形式使用缩写号不同。
Listed below are some common informal contractions, with example sentences. Note that the example sentences may be a little artificial because when we use a contraction we may also use other contractions in the same sentence, or even drop some words completely. For example:
以下为一些带有例句的常见非正式缩写形式。注意例句可能有一点不真实，因为例句中当我们使用某缩写形式时还可能使用其他缩写形式，甚至完全舍去同样的单词。比如：
What are you going to do? 你要做什么？
Whatcha going to do?
Whatcha gonna do?
Do you want a beer? 你想喝杯啤酒吗？
Do you wanna beer?
D'you wanna beer?
D'ya wanna beer?
Ya wanna beer?
Wanna beer?
These informal contractions are not "correct" English. Do not use them in a written exam, except in appropriate situations.
这些非正式缩写形式不是“正确的”英语。不要再书面考试中使用它们，除非是在合适的情况下。
ain't = am not/are not/is not
I ain't sure. 我不确定。
You ain't my boss. 你不是我老板。
ain't = has not/have not
I ain't done it. 我还没这么做。
She ain't finished yet. 她还没完成。
gimme = give me
Gimme your money. 把你的钱给我。
Don't gimme that rubbish. 不要给我那些垃圾。
Can you gimme a hand? 你能帮我个忙吗？
gonna = going to
Nothing's gonna change my love for you. 没有什么能改变我对你的爱。
I'm not gonna tell you. 我不会告诉你的。
What are you gonna do? 你要做什么？
gotta = (have) got a
I've gotta gun. 我有一把枪。
I gotta gun. 我有枪。
She hasn't gotta penny. 她分文没有。
Have you gotta car? 你有车了吗？
gotta = (have) got to
I've gotta go now. 我得走了。
I gotta go now. 我现在要走了。
We haven't gotta do that. 我们还没有要那么做。
Have they gotta work? 他们有工作了吗？
kinda = kind of
She's kinda cute. 她有点可爱。
lemme = let me
Lemme go! 让我走！
wanna = want to
I wanna go home. 我想回家。
wanna = want a
I wanna coffee. 我想要一杯咖啡。
whatcha = what are you
Whatcha going to do? 你要做什么？
whatcha = what have you
Whatcha got there? 你拿着的是什么？
ya = you
Who saw ya? 谁看见你了？摘自：51talk