如题所述
to do是不定式主动式 to be done 是被动式，在一些特殊情况下，用主动表被动
1.The question is easy to answer. 记住这个句子，只要句子结构是“ 主语+动词+形容词+ to do.to do 和本句主语构成逻辑上的动宾关系。to answer the question is easy. to breath the morning air is so good.这样的句子就用主动表被动。
2. I have some clothes to wash.衣服是本句的主语我去洗的
I have some clothes to be wash. 衣服是 “我”以外的人洗的（比如送到洗衣店，或别人帮忙。）
have sth. to do have sth. to be done
3 I know what to expect in my new job.疑问词+不定式， 主动表被动。
1.The question is easy to answer. 记住这个句子，只要句子结构是“ 主语+动词+形容词+ to do.to do 和本句主语构成逻辑上的动宾关系。to answer the question is easy. to breath the morning air is so good.这样的句子就用主动表被动。
2. I have some clothes to wash.衣服是本句的主语我去洗的
I have some clothes to be wash. 衣服是 “我”以外的人洗的（比如送到洗衣店，或别人帮忙。）
have sth. to do have sth. to be done
3 I know what to expect in my new job.疑问词+不定式， 主动表被动。
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