there is so much work to be done和I have so much work to do.

题目

there is so much work to be done和I have so much work to do.
不定式中到底什么时候有主动什么时候用被动.
morning air is so good to beathe的原因.

答案

如果句子的主语不是不定式的逻辑主语,则不定式需用被动语态.*i am going to the post office ,for i have a letter to post.《主动语态》(我要到邮局去,因为我有信要寄.) （句子主语i是不定式to post的逻辑主语,是我...