被动语态的构成形式一、被动语态的构成形式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+done(过去分词)一般现在时例Visitorsarerequestednottotouchtheexhibits
2)has/havebeendone现在完成时例Allthepreparationsforthetaskhavebeencompleted,andwe'rereadytostart
3)am/is/arebeingdone现在进行时例Anewcinemaisbeingbuilthere.4)was/weredone一般过去时例IwasgiventenminutestodecidewhetherIshouldrejecttheoffer
5)hadbeendone过去完成时例Bytheendoflastyear,anothernewgymnasiumhadbeencompletedinBeijing
6)was/werebeingdone过去进行时例AmeetingwasbeingheldwhenIwasthere
7)shall/willbedone一般将来时例Hundredsofjobswillbelostifthefactorycloses
8)should/wouldbedone过去将来时例Thenewswouldbesenttothesoldier'smotherassoonasitarrived
9)shall/willhavebeendone将来完成时(少用)例TheprojectwillhavebeencompletedbeforeJuly
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+b