英语中的连词用法

连词连词是一种虚词，它不能独立担任句子成分而只起连接词与词，短语与短语以及句与句的作用。连词主要可分为两类：并列连词和从属连词。一．并列连词：用来连接平行的词、词组和分句。1、and(1)连接两个并列的谓语：Theysatdownandtalkedaboutsomething.(2)连接两个并列的动词不定式，第二个不定式往往省略to：Theystartedtodanceandsing.(3)可以和祈使句或名词词组连用表示条件（or也有此用法）：Makeupyourmind,andyou'llgetthechance.=Ifyoumakeupyourmind,you'llgetthechance.Onemoreeffort,andyou'llsucceed.=Ifyoumakeonemoreeffort,you'llsucceed(4)当表示整体或者指同一人时谓语动词用单数,当and连接的单数名词前分别有each，every，no等词修饰时，谓语也用单数。Thebreadandbutterisreallydelicious(美味的).Themotherandteacherisverystrictwithherson.Noteacherandnostudentisallowedtosmokeinclass.(5)连接两个相同意思的词，表示“渐渐”，或加强语气：Readitagainandagain2、both…and两者都Bothheandsheplaythepiano.3、neither…nor既不…也不…谓语动词采用就近原则，与nor后的词保持一致。Neitheryounorheistoblame.4、notonly…but(also)不但…而且…Sheplaysnotonlythepiano,but(also)theguitar.*notonly…butalso关联两个分句时，一个分句因有否定词not而必须倒装。Notonlydoeshelikereadingstories,butalsohecanevenwritesome.5、aswellas也，与…一样Theteacher,aswellasthestudents,isinterestedintheactivity.二．表示选择关系1)or或者Whichdoyouprefer,coffeeorjuice?Hurryup,oryou'llbelatefortheclass.2)either…or或者…或者…（谓语动词采用就近原则）EitheryouorIamright.3)orelse/otherwise否则Besilent,orelseyouwillbekickedout.Iamtired,otherwise,Iwouldplay.三．表示转折或对比关系1)but但是Heisrichbutunhappy.2)while然而（表示对比意味）Somepeoplelovecats,whileothershatethem.3)yet然而Shesaidshewouldbelate,yetshearrivedontime.4)however然而，可是Shedoesnotlikehim,however,Ilikehim.5)not…but…不是…而是…（not和but后面的用词要遵循一致原则）It'snotmybook,butishisbook.四．表示因果关系1)for因为（做并列连词使用时，是在对先行的句子补述原因或者理由，只可以连接句子与句子，通常不置于句首）Heisabsenttoday,forheisill.2)so,therefore因此Hehurthisleg,sohecouldn'tplayinthegame.Ithink,thereforeIam.3)then那么，因而Runfast,thenhewon’tcatchyou.注意：a.两个并列连词不能连用，但therefore,then,yet可以和并列连词连用。YoucanwatchTV,andoryoucangotobed.(错误)Hehurthisleg,andso/andthereforehecouldn'tplayfootball.(正确)b.although不与but连用，但是although可以与yet连用Althoughhewasill,buthetriedhisbesttodothework.(错误)Althoughhewasill,yethetriedhisbesttodothework.(正确)