英语语法中有哪些要加doing

1 现在时 Be doing
2 介词后
如be accustomed to doing习惯做
be used to doing习惯做
3 以do开头的句子
如Doing exercise is important
暂时知道那么多

spend (in)doing sth
have fun doing
like doing(like to do)
finish doing
forget doing(忘记已经做某事，如果忘记需要做的事是forget to do...)
mind doing
stop doing(用法同forget doing)
be good at doing
be busy doing
What about doing
本人知识程度有限，只知道这些嘞....
pratice doing

现在进行时时 Be doing

过去进行时 用 was/were doing