中考英语语法复习系列之状语从句(时间状从与条件状从)课件20张

语法大讲堂时间状语从句时间状语从句1.用法Heeatsahamburgereveryday.Heeatsahamburgerwhenhegoeshomeeveryday.

此句时间状语为everyday.此处时间状语由一个句子充当，故称时间状语从句时间状语从句2.分类2.当……时候：when,while,as（1）when+延续性/非延续性；但when不可用于主句从句都为进行时的句子，例：①Whenmymumwascookingdinner,Iarrivedhome.

（延续性动词）②DadwaswatchingTVwhenIarrivedhome.

（非延续性动词）时间状语从句2.分类（2）while+延续性；while还可表对比，例:①WhileIwassleeping,athiefbrokein.=AthiefbrokeinwhileIwassleeping.

②MymotherwaswatchingtheSouthKoreanTVsoap,whilemybrotherwasplayinggames.(两者动作进行对比)时间状语从句2.分类（3）as强调从句和主句中两个动作交替进行或同步进行；还可表“作为…”例: ①TaylorSwiftsangasshewentalong. ②Ashegrewolder,hebecamemoreintelligent. ③Asaman,youshouldtakecareofyourfamily.（作为...）时间状语从句2.分类2.until直到…例：Iwon’tleavehereuntilyoupromisetogoshoppingwithmethisweekend.(not…until…+短暂性动词，翻译为直到...才)Iwillstayhereuntilyoupromisetogoshoppingwithmethisweekend.（持续性动词）条件状语从句条件状语从句Ifitdoesn’traintomorrow,wewillgoonapicnic.如果明天不下雨，我们将要去野餐。定义：由句子充当条件状语(前提条件)1.用法条件状语从句Ifhecomestotheparty,I’llcallyou.如果他出席派对，我将会打电话给你。2.分类两个动作发生了吗？Ifhecomestotheparty,I’llcallyou.从句() 主句()一般现在时一般将来时条件状语从句，时态上一般遵循--主将从现条件状语从句适用主将从现的词还有：unless除非,until直到,assoonas一……就,aslongas只要，例：Iwon’tgotosleepuntilmydadcomeshome.Assoonasmydadcomeshome,Iwillgotosleep.Aslongasmydadcomeshome,Iwillgotosleep.2.分类条件状语从句unless=if…not...例: （1）Let'sgooutforawalkunlessyouaretootired. （2）Ifyouarenottootired,let'sgooutforawalk.2.分类条件状语从句在谈论将来可能出现的情况时，主句还可以是含有其他情态动词的句子或者是祈使句。Wemaygooutifit'sfinetomorrow. 如果明天天气好的话，我们可能会出去。PleasecallmeifyougoshoppingnextSunday.如果下周日你去购物，请给我打电话。主情从现主祈从现条件状语从句if引导的条件状语从句和宾语从句的差别：1.I‘lltellyouaboutitifyoucome.(条件状语从句)

如果你来，我就告诉你关于它的情况。2.Idon’tknowifhewillhelpme.(宾语从句)

我不知道他是否会帮助我。意为“如果”意为“是否”条件状语从句if引导的条件状语从句和宾语从句的差别：1.I‘lltellyouaboutitifyoucome.(条件状语从句)

如果你来，我就告诉你关于它的情况。2.Idon’tknowifhewillhelpme.(宾语从句)

我不知道他是否会帮助我。时态遵循--主将从现时态受主句谓语动词影响条件状语从句【例1】Ifyourfriend______，I'lltellyou.A.come B.willcome C.comes D.arecoming【例2】Iwanttoknowifthey______tomorrow.A.come B.willcome C.comes D.came解析：此为条件状语从句，时态遵循主将从现，答案选择C。解析：此为宾语从句，时态主现从不限规则，从句中有tomorrow,故为一般将来时，答案选择B。巩固练习1.Youcan’tgetgoodgrades________youworkhardfromnowon.A.after

B.unless

C.while

D.since2.Shewillsingasong________sheisasked.A.if

B.unless

C.for

D.since3.---Doyouknowwhentheteacher________backtomorrow?

---Sorry,Idon‘tknow.Ifhe________back,I’lltellyouatonce.A.comes;comes

B.comes;willcome

C.willcome;comes D.willcome;willcome4.Iwon’tbelievethatthefive-year-oldboycanreadmagazine_________Itesthimmyself.A.if

B.when

C.after

D.until5.Whileshe________TVinthesittingroom,thebell________.A.watches;rings B.iswatching;rangC.waswatching;rang D.watched;wasringing

完成句子。1.假如你不从现在开始努力学习，你的一生都会感到遗憾。You________________________ashamedallyourlifeifyou________________________hardfromnowon.2.昨晚我直到完成任务才从办公室出来。LastnightI________________outoftheoffice________I________thetask.3.如果你现在不出发，你就会错过末班车。_________you

don’tleavenow,you__________________thefinalbus.4.除非他放弃比赛，不然他肯定会获奖。Heissuretogetaprize_____