doing:
finishdoing
likedoing
hatedoing
enjoydoing
practicedoing
keepdoing
stopdoing(停下做某事)
goondoing(继续作[刚才做的]那一件事)
还有就是介词+doing
todo:
liketodo
hatetodo
wouldliketodo
wanttodo
need作动词时有needtodo
decidetodo
stoptodo(停下来去做某事)
goontodo(继续做[另一件]事)等
{注:有一些词可以加do和doing,意思都一样,如:like和hate}
当动词是非谓语时,就用doing或todo
无法一次过说完所有的这些词组,因此,主要还是靠平时积累,见得多,就自然会有经验了.