就是说i have a lot of homework to do.什么时候to 后面用被动?比如说english is
5个回答

像I have a lot of homework to do这种,do这个动作是由主语I发出的,所以用主动形式.

而像下面两个句子,to后的动作并非主语发出的,那么就要由to前的词与动作的关系来决定是主动还是被动了

English is the main subject to be taught here.

This is the best play to be performed.