精选优质文档-倾情为你奉上同学们都知道动词不定式有主动式和被动式，即 “ to do和 to be done” 之分，但在实际使用中常有用主动形式表示被动含义的情况，比如：1). I have a lot of housework to do today.2). There are so many types of computers for you to choose.3). I think English is not so hard to learn.上述三例中的不定式与其前面的名词之间都存有被动关系，但是都用了不定式的主动式表示被动意义。那么究竟在哪些情行下可用不定式的主动表示被动呢？1. 动词不定式的逻辑主语在句子中出现或暗含在句中如：a. We have many difficulties to overcome.b. Give him some storybooks to read.c. They didnt think that a proper measure (for them) to take.d. He is n
