turn to后面是加doing还是加do,星火英语说的加doing,可我们老师说加do,到底怎么用?

turn to后面是加doing还是加do,星火英语说的加doing,可我们老师说加do,到底怎么用? ask后面是加to do还是doing,还是do? hard后面加doing还是to do refuse后面加to do 还是doing discover后面加to do还是doing? adjust to 后面加doing还是do? spend后面加doing还是to do? make a difference后面到底是加to do还是加doing? fear 后面是加doing?do?还是to do? find后面是加do还是加doing还是加to do? by后面是加do还是doing 问一个英语词组look for ward to后面是加do还是加doing