初二英语我搞不懂词组后面应该加to do 还是 doing 还是do 怎么办?

初二英语我搞不懂词组后面应该加to do 还是 doing 还是do 怎么办? 问一个英语词组look for ward to后面是加do还是加doing 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? ask后面是加to do还是doing,还是do? dislike后面加to do还是do 还是doing fear 后面是加doing?do?还是to do? glad sb后面加什么?to do,doing,还是do? must not 后面加do doing 还是to do?