会计学一、概念在句子中用来(yònɡlái)连接两个或两个以上的词、短语或句子的词，叫连词。2.按性质特点分类：并列连词和从属连词并列连词：用来连接并列的词、短语和句子的连词。主要表示两个分句之间的并列关系、转折(zhuǎnzhé)关系、选择关系和因果关系的连词。如：从属(cóngshǔ)连词：用来引导从句，一般连接主句与从句并修饰或说明主句的连词。从属(cóngshǔ)连词通常引导名词性从句和状语从句。引导名词性从句的从属(cóngshǔ)连词有：whether/if/that状语类别RevisionoftheAdverbialClauses状语(zhuàngyǔ)从句九种状语(zhuàngyǔ)从句九种(jiǔzhǒnɡ)常用的状语从句及其常用的连接词九种常用(chánɡyònɡ)的状语从句及其常用(chánɡyònɡ)的连接词九种(jiǔzhǒnɡ)常用的状语从句及其常用的连接词用横线划出下列句子中的状语(zhuàngyǔ)从句，并指出是哪种状语(zhuàngyǔ)从句：7.Wherethereiswater,thereislife.8.Hestudiedhardsothathecouldcatchupwithhisclassmates.9.Sinceyouareverybusy,Iwon'ttroubleyou.10.Evenif(though)Ifail.I’llneverloseheart.11.Onceyoubeginthework,youmustcontinue.12.Althoughthesunwasshining,itwasn’tverywarm..1、when,while,as的区别2、itis…since…和itis…before…3、because,as,for,since的区别4、状语(zhuàngyǔ)从句倒装5、状语(zhuàngyǔ)从句的省略。1.while引导时间状语(zhuàngyǔ)从句，意为“当……的时候”；从句的动作必须是延续性的，(区别when)如：Pleasedon’ttalksoloudwhileothersareworking.2.while引导时间状语(zhuàngyǔ)从句,意为：趁…的情况赶紧做Strikewhiletheironishot.3.while引导让步状语(zhuàngyǔ)从句，意为“尽管，虽然”，相当于althoughWhileIadmitthattheproblemsaredifficult,Idon’tagreethattheycan’tbesolved.4.while作为并列连词，意为“而，却”，表示对比。JanewasdressedinbrownwhileMarywasdressedinblue.1.as可用来引导(yǐndǎo)时间状语，意为“一边…一边”；“随着”Shesangasshewalkedhomealltheway.(一边…一边）Shewasdoingherhomeworkasshewaslisteningtothemusic.Asshegrewolder,shebecamemorebeautiful.（随着）Asthedaywenton,theweathergotworse.2.as引导(yǐndǎo)原因状语从句，意为“因为、由于”Assheisfreetoday,shewouldliketodosomeshopping.3.as引导(yǐndǎo)让步状语从句（从句必须倒装）意为“尽管”。Tiredashewas,herefusedtotakearest.（尽管）Hardasheworked,hecan’tworkouttheproblem.Childasheis,heknowsalot.Tryashemight,hewouldn’tsucceed.2.Itis…before…和itis…since…(1)从句常用一般过去时,主句常用现在完成时或完成进行时（表示(biǎoshì)时间段时，可用一般现在是）。(2)固定句型：Itis/hasbeen＋段时间＋since＋一般过去时。3.because,as,for,since表“因为(yīnwèi)”的区别1、Sodifficult_____ittoliveinanEnglish-speakingcountrythatIdeterminedtolearnEnglish.(01上海)A.IhavefeltB.haveIfeltC.IdidfeelD.didIfeel2、Notuntilallthefishdiedintheriver_____howseriousthepollutionwa