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1、副词性从句（状语从句）语法讲与练从句分三类：名词性从句，形容词性从句，副词性从句。副词性从句就是状语从句。高考状语从句考查重点从属连词的选择；同类状语从句中连词的辨析。状语从句在主从复合句中作状语修饰主句中的动词，形容词或副词，按意义可分为时间、地点、原因、目的、结果、条件、行为方式、比较、让步等九种状语从句。一般位于句首或者句末，位于句首，用逗号和主句格开。引导状语从句的关联词是从属连词状语类别从属连词时间when,whenever,as,while,before,after,till(until),s
2、ince,eversince,once,assoonas,soonafter,themoment,theminute,immediately等，eachtime,everytime,lasttime,bythetimenosooner…than,hardly…when地点where,wherever原因because,as,since,consideringthat,nowthat目的sothat,inorderthat,forfearthat,incase结果/程度sothat,so…that,such
3、…that,that,withtheresultthat条件if,unless,as(so)longas,as(far)as,incase,onconditionthat比较as…as,notas(so)…as,than让步though,although,evenif,eventhough,as,however,whatever,whenever,wherever,whoever,whether…or,nomatterwho/what/which/where/when/whether/how行为方式as,
4、asif,asthough考点（1）when,as,while引导时间状语从句When既可引导持续动作，又可引导短暂动作。它表示主句动作和从句动作同时发生，或从句动作在主句动作之前。WhenIwasaboy,IusedtogototheseashoreonSundays.（同时）Whenthelessonwasover,webeganourwriting.（从句动作在前）while指“在某一时间里”，“在…期间”，从句动作必须是持续性；也强调主句和从句动作的同时发生，往往侧重主从句动作的对比。Whileh
5、ewasinLondon,hestudiedmusic.as常和when,while通用，但侧重主句和从句的动作同时发生，说明两种正在发展和变化的情况。Hehurriedhome,lookingbehindashewent.Isawyoursisterasshewasgettingonthebusyesterday.Hesangashewalked.一、时间状语从句______heleftschoolatfourteen,hebegantotrainasanengineer.A.WhileB.SinceC
6、.WhenC.Then______thedaywenton,theweathergotworse.A.WithB.SinceC.WhileD.As当when,as,while表示“在…一段时间里”，主从句的动作同时发生时，可以换用。如：While(When或As)wewerediscussing,Mr.Smithcamein.____ayoungman,hewenttoFranceforFrench.A.WhenB.WhileC.AsD.Since*when可表示“如果”。如：Don’tbeafraido
7、faskingforhelp_____itisneeded.A.UnlessB.sinceC.althoughD.whenwhen和while还可以是并列连词，意思分别是“就在这时”，“然而”。如：Hewasabouttotellmethesecret____someonepattedhimontheshoulder.asB.untilC.whileD.whenIdoeverysinglebitofhousework____myhusbandBobjustdoesthedishesnowandthen.s
8、inceB.whileC.whenD.asJasminewasholidayingwithherfamilyinawildlifepark____shewasbittenonthelegbyalion.A.whenB.whileC.sinceD.before考点2表示时间的词组引导状从assoonas,nosooner…than…,hardly(barely,scarcely)…when…等用法都表示主从动作相继发生。hard
