题目内容：

Be后怎么跟动词原形 All we have to do is clean or peel it
原句:Most fruits are naturally sweet and we can eat them just the way they are-all we have to do is clean or peel them.

优质解答

实际上这里应该是to do的,但是由 all,what 引导的主语从句或者主语被only,first,one,least 或形容词最高级修饰时,而且从句中含有do时,其表语如果是动词不定式,则往往省去to.