Section Ⅲ Grammar 复习被动语态语 境 自 主 领 悟先观察原句后自主感悟1.Today，carnival in Venice is celebrated for five days in February.2.If they broke the laws，they were put into prison for up to two years.3.The party will be held in five days.4.Two hundred trees have been planted since the man came here.1.句 1 用了一般现在时的被动语态，其构成为“am/is/are＋过去分词”。2.句 2 用了一般过去时的被动语态，其构成为“was/were ＋过去分词 ”。3.句 3 用了一般将来时的被动语态，其构成为“will/shall＋be＋过去分词”。4.句 4 用了现在完成时的被动语态，其构成为“have/has ＋ been ＋过去分词 ”。一、被动语态的基本时态变化1．各种时态被动语态的构成被动语态由助动词 be 和及物动词的过去分词构成。被动语态可用于各种时态，其时态变化通过助动词 be 的不同形式来体现。时态动词的被动形式例句一般现在时am/is/are doneEnglish is taught in most schools.一般过去时was/were doneThe letter was typed on the computer.一般将来时shall/will be doneThe problem will be discussed tomorrow.现在进行时am/is/are being doneThe bridge is being built.过去进行时was/were being doneAt that time the desk was being repaired.现在完成时have/has been doneThe house has been built.过去完成时had been doneThey said that their work had been finished.过去将来时would be doneHe said the trees would be planted soon.2.被动语态的特殊形式(1)含有情态动词的被动语态的结构为：情态动词＋be＋过去分词Something must be done to stop the water from being polluted.必须采取措施来制止水受到污染。(2) “get＋过去分词”式被动语态 在口语和非正式的语体中，常用“get＋过去分词”表示被动语态，其中 get 相当于 be 动词，起助动词的作用。这种形式一般用来谈论突然发生的事，通常只表示动作，不表示状态。Some glasses got broken when we were moving.我们搬家时有些玻璃杯被打碎了。[即时训练 1] 完成句子①We are not allowed(不允许) to enter the chemistry lab without a teacher.②The book has been published(已经出...
