高考中when的用法.ppt

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1、高考中when的用法（2012西城一模）29．Whydosomerichpeoplestealthings____theycouldeasilyaffordtobuythem?A．unlessB．beforeC．ifD．when一、when用作从属连词，含义如下：1.既然.........例如：Youmustadmititwhenyouhavemade amistake.2.一........就.......例如：Wewillstandupwhenourteachercomesin.3.如果.......例如：Callmeatoncewhenyouareill.4.当.....

2、....时候       例如：WhenIgottothestation,thetrainhadleft.5.然而；可是”，相当于although例如：Shestoppedtrying,whenshemighthavesucceedednexttime.二、when作为对等连词，意为：“正在此时；正在这时”。常见句型如下：1.be doing somethingwhen................ Iwasdoingmyhomeworkwhenthetelephonerang.2.beabouttodosomethingwhen............ Hewasabout

3、toleaveherewhenthetelephonerang.3.beonthewayto...when.................  Iwasonmywaytothelecturewhensomeoneaskedmefordirections.4.bebusydoingsomethingwhen............. Iwasbusywritingmycompositionwhenhecametovisitme.5.beonthepointofdoingsomethingwhen......... I wasonthepointofhavingarestwhe

4、nthetelephonerang.6.hadjustdonesomethingwhen............. Ihadjustfinishedmyhomeworkwhenitrainedheavily.7.hadnotdonesomethingwhen............... Ihadnotfinishedmyhomeworkwhen heaskedmetogooutforplay.三、when用作关系副词引导定语从句例如：Ihave neverforgettenthedaywhen(onwhich)Ijoinedthearmy.四、when可以用作连接副词，引

5、导名词性从句。when在从句中既起连接作用同时也作状语Iremember______thisusedtobeaquietvillage.A.whenB.howC.whereD.what五、固定搭配1.Somebodyhate/love/enjoy/appreciate/likeitwhen..............例如：I likeitintheautumnwhenthewheatherisclearandbright.2.Hardly..........when.........(一.....就.....）例如：HardlyhadI gottoschoolwhenthebel

6、lrang.3.Whenitcomesto.........   (当谈及.......）例如：Whenitcomestoeducation,alotofpeoplethinkitisalifelongstudy.六、when引导时间状语从句时，如果主从句主语一致或从句主语为it，且从句中的谓语部分含有be的形式，可将从句主语和be省略When______,themuseumwillbeopentothepublicnextyear.A.completedB.completingC.beingcompletedD.tobecompleted实践操练1.Wewereswimming

7、inthelake______suddenlythestormstarted.A.whenB.whileC.untilD.before2.Don’tbeafraidofaskingforhelp______itisneeded.A.unlessB.sinceC.althoughD.when3.翻译：队长一来我们就出发。（用when)Wewillstartwhentheteamleadercomes.4.Hewasabouttotellmethesecret