摘要： 主+be +adj. +to do: 不定式一般用主动式.与主语存在逻辑上的动宾关系.所以当不定式的动词是不及物动词时.则应在其后加上适当的介词. 主+be +adj. +to do= It be +adj.+ +to do sth eg. This question is difficult to answer. =It’s difficult to answer the question. The man is hard to work with.=It’s hard to work with the man. 当不定式用作定语时.与其所修饰的词之间存在逻辑上的动宾关系.且主语为该动作的执行者时.也常常用主动形式. Eg. He wants water to drink. She has a room to live in. I will go to Beijing tomorrow. Do you have anything to be taken there?

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