makesb.dosth.
letsb.dosth.
decidetodo
lookforwardtodoing(to作介词)
needtodo
wanttodo
begin/starttodo
remembertodo/doing
forgettodo/doing
Ittakessb.sometimetodo
whynotdo?
whydon'tyoudo
what/howaboutdoing?
hatetodo
like/love/enjoydoing
besuretodo
can/could/must/may/mightdo
seemtodo
stoptodo/doing
learntodo
keepdoing