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1、被动语态总结1. 被动语态的基本时态变化被动语态通常为十种时态的被动形式, 被动语态由“be过去分词”构成，be随时态的变化而变化。以do为例，各种时态的被动语态形式为1) am/is/are +过去分词【一般现在时My shirt is made of cotton.2）was/were+过去分词【一般过去时Zippers were invented in1893.2. 被动语态的特殊结构形式1)带情态动词的被动结构。其形式为：情态动词be过去分词Teenagers should be allowed to choose their own clothes2在使役动词have, make,
2、get以及感官动词see, watch, notice, hear, feel, observe等后面不定式作宾语补语时，在主动结构中不定式to要省略，但变为被动结构时，要加toSomeone saw a stranger walk into the building. =A stranger was seen to walk into the building.3接双宾语的谓语动词改为被动语态时，如果用直接宾语（事物）做主语，间接宾语前要加介词to或者for动词send，give，pass，take，bring，show等加to动词buy，make，do等加forHe sends me a
3、postcard as a gift=A postcard is sent tome by him as a giftHe bought me a book=Abook was bought for me by him4)动词短语用于被动语态时，作为一个整体，不能丢掉其中的介词或者副词He listens to the tape on weekends=The tape is listened by him on weekends5)当“动词+宾语+宾语补足语”结构变为被动语态时，将宾语变为被动结构中的主语,宾语补足语不动作为主语补足语We should keep our city clean
4、=our city should be kept clean by us6）在need，want，require, bear等词的后面，动名词用主动形式表示被动意义，其含义相当于动词不定式的被动形式。The house needs repairing（to be repaired）这房子需要修理。3.It is said that+从句及其他类似句型一些表示“据说”或“相信”的动词如believe, consider, expect, report, say, suppose, think等可以用于句型“Itbe过去分词that从句”或“主语be过去分词to do sth.”。有：It is said that 据说It is reported that据报道It is believed that大家相信It is hoped that大家希望It is well known that众所周知It is thought that大家认为It is suggested that据建议
