1.一般现在时的被动语态构成：is/am/are+及物动词的过去分词 　　Ourclassroomiscleanedeveryday. 　　Iamaskedtostudyhardbymymother. 　　Knivesareusedforcuttingthings. 　　2.一般过去时的被动语态构成：was/were+及物动词的过去分词 　　Anewshopwasbuiltlastyear. 　　Dinosaureggswerelaidlonglongago. 　　3.现在完成时的被动语态构成：has/have+been+及物动词的过去分词 　　Thisbookhasbeentranslatedintomanylanguages. 　　Manyman-madesatelliteshavebeensentupintospacebymanycountries. 　　4.一般将来时的被动语态构成：will+be+及物动词的过去分词 　　Anewhospitalwillbebuiltinourcity. 　　Manymoretreeswillbeplantednextyear. 　　5.含有情态动词的被动语态构成：情态动词+be+及物动词的过去分词 　　Youngtreesmustbewateredoften. 　　Yourmistakesshouldbecorrectedrightnow. 　　Thedoormaybelockedinside. 　　Yourhomeworkcanbehandedintomorrow. 　　6.现在进行时的被动语态构成：am/is/are+being+及物动词的过去分词 　　UncleWangismendingmybikenow.→ 　　MybikeisbeingrepairedbyTomnow. 　　Theyareplantingtreesoverthere.→ 　　Treesarebeingplantedovertherebythem. 　　7.不定式的被动语态：to+be+及物动词的过去分词 　　Therearetwobookstoberead.→ 　　Therearetwentymoretreestobeplanted.