被动语态不定词

被动式不定词是用在某些使用被动语态的句构上。尤其常用在助动词(may丶should丶could 等)后面来表达「什麽是可能的」丶「该如何做才正确」,尤其常见。被动不定词的构成为:
to be + 过去分词

如同现在式不定词,有些时候必须用上不带 to 的被动语态不定词,因此 to 会被省略掉。这种情况会发生在多数情态助动词后,以及用在其他使用零不定词的地方。

举例
  • I am expecting to be given a pay-rise next month.
  • She is hoping to be elected president.
  • The carpet needs to be washed.
  • These doors should be shut at night.
  • This window may be opened but that one must stay closed.
  • Alice could be given a prize for her artwork.