he has homework 后面用to do还是does（he does后面用has还是用have）

He has homework 后面用to do不用does。

①He has homework to do.这里的to do是后置定语，也就是用动词不定式作后置定语，表示一种动宾关系，被修饰的名词为动词不定式的直接宾语，即to do - homework.

②而does是谓语动词，要用在主语后面，只能用He does homework.

所以he has homework后面用to do不用does