专题复习(十二)---被动语态一、常见五种被动语态的构成时态构成例句一般现在时am/is/are+过去分词Heislovedbyallhispupils
一般过去时Was/were+过去分词Manytreeswereplantedlastyear
一般将来时will/shall/begoingto+be+过去分词Childrenwillbetakengoodcareofbyher
现在完成时have/has+been+过去分词Thedoorhasbeenpainted
含情态动词情态动词+be+过去分词Theproblemmustbesolvedsoon
二、省略to的动词不定式的被动语态在主动语态的句子中,一些表示感官或使役意义的动词,如hear,watch,see,feel,notice,listento,lookat,let,make,have和help等后面的宾语补足语是动词不定式时,主动语态中要用不带to的动词不定式,但当这样的主动语态变为被动语态时,必须把省略的动词不定式符号to补出来
eg:Weoftenhearhersingintheroom
------Sheisoftenheardtosingintheroombyus
Thebossmadethemworkfor16hoursaday
----Theyweremadetoworkfor16hoursaday
三、练习:把主动语态变成被动语态1
Wecleanourclassroomtwiceaday
--Ourclassroom________________byustwiceaday
Parentsshouldallowchildrentomaketheirowndecision
----Children__________________________tomaketheirowndecisio