To learn English is very important.
It's very important to learn English.
My idea is to ring him up at once.
I have decided to go to Binjiang Primary School.
a. ask, want, teach, tell, know, would like, allow等动词后面接动词不定式作宾语补足语。
如： The policemen asked him to get off the bus.
b. hear, see, look at, feel, watch, notice, listen to等动词后接不带to的动词不定式作宾语补足语。
如： We often see Miss Li clean the classroom.
c. let, make, have这些使役动词后接不带to的动词不定式作宾语补足语。但在被动语态中这些不带to的都须带上to。
如： In those days the bosses often made the workers work day and night.
如： Can you help me (to) carry the heavy bag?