能不能i am interesting to do sth?为什么 那为什么可以是i am happy to do st

能不能i am interesting to do sth?为什么 那为什么可以是i am happy to do st 英语语法常识I am happy to do sth中 To do sth 是主语补足语还是状语,还有,为什么有的句子中 为什么I am sorry 后要加to do? I am here to do sth 为什么是Do you want to know what I do?而不是what am do? 英语语法问题Sth be adj to do Sth.中do是什么成份啊?I am happy to do sth中,d be late for sth做某事迟到啦,为什么不说be late do sth 比如 I am late to ha I plan to do sth和I am planning to do sth的区别 I am looking forward to seeing you soon.为什么是seeing ,to do 的形 l am happy to do sth 怎么看句子成分 Do you like to do sth?为什么回答是Yes ,I do.不是Yes,I like. 是how am i going to do还是what am i going to do