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
The policemen asked him to get off the bus
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。
We often see Miss Li clean the classroom
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
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
In those days the bosses often made the workers work day and night.
动词help接动词不定式作宾语补足语,可带to也可不带to
Can you help me (to) carry the heavy bag?