help (to) do sth.帮助做某事。
can't help doing sth.情不自禁做某事。
2.need to do sth .其中的need做实意动词。
need doing sth.这是个是被动语态形式。
3.like to do sth这是偶尔性的动作。
like doing sth这是经常性的动作。
4.keep不能,
只有keep doing sth.保持处于某种状态,或继续做某事。
5.stop to do sth停下来做某事
stop doing sth停止做某事
6.go on to do sth继续做某事(不是同一件事)
go on doing sth继续做某事(同一件事)
like,keep,stop,go on
prefer to doing sth. to doing sth.
remember to do sth
remember doing sth
同样,forget