2015大学英语四级语法专项考点辅导3思维导图

在以as,than,when,if,unless等引导的从句中的省略:在有些状语从句中,如果谓语包含有动词be,主语又和主句的主语一致a),或者主语是itb),就常常可以把从句中的主语和谓语的一部分(特别是动词be)省略掉.

Lookoutforcarswhencrossingthestreet.

Whentakenaccordingtothedirections,thedrughasnosideeffects.

Whiletherehejoinedinvoluntarylabouronaproject.

Althoughnotyetsixmonthsold,shewasabletowalkwithoutsupport.

Ifnotwellmanaged,irrigationcanbeharmful.

Thoughreducedinnumbers,theygainedinfightingcapacity.

Thisviewpoint,howeverunderstandable,iswrong.

Enemies,oncediscovered,weretightlyencircledandcompletelywipedout.

Shehurriedlylefttheroomasthough/ifangry.

Sheworkedextremelyhardthoughstillratherpoorinhealth.

Fillintheapplicationasinstructed.

Wheneverknown,suchfactsshouldbereported.

Thedocumentswillbereturnedassoonassigned.

Hesaidthatnoacrobatcouldeverperformthosedaringfeatsunlesstrainedveryyoung.

Oncehavingmadeapromise,youshouldkeepit.

IfnecessaryI’llhavetheletterduplicated.

Fillintheblankswitharticleswhere(ver)necessary.

Ifpossible,Ishouldliketohavetwocopiesofit.

Asscheduled,theymetonJanuary20attheChineseEmbassy.

在以thana)或asb)引起的从句中,常会有一些成分省略.

Hetoldmenottousemorematerialthan(itis)necessary.

Weshouldthinkmoreofthecollectivethanofourselves.

Theyworkedwithasmuchenthusiasmasyoungpeople(did).

Heisnowavice-manager,butstilloftenworksinthekitchenasbefore.

Theirtrainingisfree,asisalleducation.

Wewill,asalways,standonyourside.

错误的省略

HislifeisasfullycommittedtobooksasanyoneIknow.

Whilestandingthereinhernightgown,twobulletsstruckthewallbesideher.

一致

如果主语是单数,尽管后面跟有with,togetherwith,aswellas,asmuchas,nolessthan,morethan等引导的短语,谓语动词仍旧用单数形式.

Terry,alongwithherfriend,goesskatingeverySaturday.

Anexpert,togetherwithsomeassistants,wassenttohelpinthiswork.

Thecaptain,aswellasthecoaches,wasdisappointedintheteam.

(责任编辑：田学江)