can not help 有哪几种用法?

can not help 有哪几种用法? can not help 的用法 can not help doing sth的用法是什么? can not help Not if I can help not if i can help it can not help but后面接什么 i can not help but wondering can not help doing 怎么用啊 can not wait to do sth和can not help doing sth还有can stop doin must not be 和 can not be 的用法区别 Help me!Help me!Why I can not type Chinese?How can I do?