被动语态用法

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1、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.Iamaskedtostudyhard.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Thisbookhasbeentranslatedintomanylan

2、guages.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.Thedoormay

3、belockedinside.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.→Therearetwe

4、ntymoretreestobeplanted.8.过去将来时的被动语态：would+be+及物动词的过去分词Hesaidhewouldfinishtheworksoon.Hesaidtheworkwouldbefinishedsoonbyhim.主动语态改被动语态把主动语态改为被动语态非常简单，可以遵循以下几个步骤：1.先找出谓语动词；2.再找出谓语动词后的宾语；3.把宾语用作被动语态中的主语；4.注意人称、时态和数的变化。例：1.Brucewritesalettereveryweek.→AletteriswrittenbyBruceeverywe

5、ek.2.LiLeimendedthebrokenbikethismorning.→ThebrokenbikewasmendedbyLiLeithismorning.3.Hehaswrittentwonovelssofar.→Twonovelshavebeenwrittenbyhimsofar.4.Theywillplanttentreestomorrow.→Tentreeswillbeplantedbythemtomorrow.5.Lucyiswritingaletternow.→AletterisbeingwrittenbyLucynow.6.Y

6、oumustlockthedoorwhenyouleave.→thedoormustbelockedwhenyouleave.使用被动语态的注意问题1.不及物动词无被动语态。Whatwillhappenin100years.Thedinosaursdisappearedabout65millionyearsago.2.有些动词用主动形式表示被动意义。Thispenwriteswell.Thisnewbooksellswell.3.感官动词或使役动词使用省略to的动词不定式，主动语态中不带to，但变为被动语态时，须加上to。例：makesomebody

7、dosomething→somebody+be+madetodosomethingseesomebodydosomething→somebody+be+seentodosomethingAgirlsawmywalletdropwhenshepassedby.→Mywalletwasseentodropbyagirlwhenshepassedby.Thebossmadethelittleboydoheavywork.→Thelittleboywasmadetodoheavyworkbytheboss.Hismothergavehimapresentfo

8、rhisbirthday.→Hewasgivenapresentbyhismotherforhisbirth