I'M having fun 这句子是什么语法啊?

I'M having fun 这句子是什么语法啊? I think it must be teenagers having fun.这句话的句子结构是怎样的 I'm all for people having fun.翻译 中译英：请问哪位可以告诉我这两个句子的中文意思?Sometimes I get fed up when I see my friends going out together and having fun.I'm also suffering from schoolwork.get fed up having fun的用法是having fun to do sth?是having fun doing sth?还是having fun do sth? I'm sure___more fun.A have B to have C having I have no time for having fun. HAVING FUN I having a big meal I 'm having a big meal 哪个句子对?是在现在进行时的情况下 now i'm having pupils,fun,having,are,here,the.怎么组成一个句子 I've Just Begun(Having My Fun) 歌词 I Ve Just Begun (Having My Fun) 歌词 They are having a fun in Australia.这句子有什么错误?请帮我改一改! Every night we hear strange noises outside I think it ____ be teenagers having fun ,though I'M not sureA.must Bshould C.will D.could 句子My friends and I think it must be teenagers having fun.中 为什么最后的have要用动词ING形式 but my friends and i think it must be teenagers having fun为什么用having the whole day throuth at the beach in the summer sun.everybody's having fun .请翻译,having fun 是having fun time 的缩写吗