fail to do和 fail doing有区别没?

fail to do和 fail doing有区别没? fail to do sth和fail in doing sth的区别 miss doing和fail to do fail和fail in 有什么区别? fail to do与fail (in) sth有什么区别啊 fail sth.和fail in sth.有什么区别? never fail to do fail to do=? often fail to do fail后可接to do sth吗,不是接fail in doing sth?为什么? fail的几种用法fail in sthfail in doing sthfail to do sthfail sth fail to do sth与forget to do的区别