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一般时的被动 be+done(一般现在时和一般过去时)A The flowers are watered B The flowers were watered yesterday 正在进行时的被动be doing done The flowers are\were being watered 完成时的被动 have\has\had been done The flowers have\had been watered 正在进行的被动 be being done The flowers are\were being watered 特殊用法:(1)主动形式表示被动意义 11常见的这类动词有:“act,add up,clean,compare,count,cook,draw,fill,iron,keep,let,look,make up,milk,kill,open,photograph,prove,read,sell,smoke,spoil”等。 The window won’t open.(这扇窗户打不开。) The cow milks well.(这头牛出奶率很高。) 2There be句型: There are a lot of things to do. There is nothing to worry about. 3不定式修饰want, have等动词的宾语,而句中的主语同时又不是不定式的逻辑主语时: I want some clothes to wash. 4不定式修饰buy,get,give等动词的直接宾语,而句中的间接宾语又是不定式的逻辑主语时: His sister gave him a bike to ride. (2)“It is+V-ed+that-··"结构表示被动 常用的这类结构有:“it is said that…”(据说);It is supposed that…(据推测);It is well known that"…(众所周知);It is believed that"…(据信);It is reported that"…(据报导);It is hoped that"…(人们希望);It is generally considered that"…(有人认为);1twill be seen that"…(由此可以看出);It must be admitted that…(必须承认);It must be pointed out that…
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