1、三者的意思不同
gotta = have got to,必须,要,也就是相当于have to;gonna = going to,将要;wanna = want to,想要做某事。
2、用法不同
gotta = have got to,必须,要,
例如: have got to go now. = I gotta go now. 我现在必须要走了。I gotta leave here tomorrow. 我明天得离开这儿。
gonna = going to,将要,它的前面应该还有个be动词,等同于be going to.
例如:I am going to play piano now. = I’m gonna play piano now. 我现在要弹钢琴了。We are gonna meet you at the gate of the zoo. 我们将在动物园门口见。
wanna = want to,想要做某事
这些个片语算是由于长期口语化之下的产物,一般较正式的场合,文件之类的,不会出现的。但是在一般日常生活,已被大家接受,并大量出现在流行文化中,比方是流行歌曲的歌词里面。
例如:I want to go swimming. = I wanna go swimming. 我想游泳。I wanna have a big dinner. 我想大餐一顿。