Unit5NaturesTemperSectionAGrammarFocus课件人教版英语八年级下册

Nature’sTemper(Period3)SectionA(GrammarFocus)

Shareyourwriting.Homeworkfromthelastclass:Writethebadeffectsofatyphoonandsafetytipsonatyphoon.Do

you

have

other

ideasabouttheeffectsandsafetytips?Sharethemwiththeclass.Readthesesentencesandfindoutthecommonword.Whenitwas8o’clockintheevening,Iwasdoingmyhomework.Iwashavingbreakfastwhenmyfriendscametomyhouse.MydogwaseatingsomethingwhileIwaswatchingTV.Whilehewaswashinghishands,theskybecamedark.Readthesentences.Underlinetheverbswhichshowanongoingactioninthepast.Whatwereyoudoingwhileitwassnowingheavily?Iwastravellingonthetrainthen.Whatwereyourfamilydoingwhenthetyphoonhit?MychildrenandIwerereadingtogether.Whenmyneighbourcalled,myfamilywerehavingdinner.Weweredrivinghomewhenthestrongwindsstarted.Whileweweredrivinghome,thestrongwindsstarted.Itwasraininghardwhileweweredrivingback.Readthesesentencesandfindoutthecommonpoints.Whenitwas8o’clockintheevening,Iwasdoingmyhomework.Iwashavingbreakfastwhenmyfriendscametomyhouse.MydogwaseatingsomethingwhileIwaswatchingTV.Whilehewaswashinghishands,theskybecamedark.过去进行时的基本用法过去进行时表示过去某个时刻或某一阶段正在进行的动作。过去进行时表示在过去某个确定的时间点或某一段时间里正在发生的动作。因此，原则上常和表示过去的时间状语连用。例如：then,atthis/thattime,yesterday,lastnight。E.g.Iwasplayingvolleyballwithmyfriendsyesterdayafternoon.IwasdoingmyhomeworkwhilemysisterwaswatchingTVlastnight.ThinkandDiscussWhatarethedifferencesbetweenwhenandwhilewhenusedinpastcontinuoustense?Whatwereyoudoingwhileitwassnowingheavily?Whatwereyourfamilydoingwhenthetyphoonhit?Whenmyneighbourcalled,myfamilywerehavingdinner.Whileweweredrivinghome,thestrongwindsstarted.Itwasraininghardwhileweweredrivingback.有些情况下，句子中没有明确表示时间的状语，但从句子的上下文中可以得知这是在过去某一时间内正在进行的动作。E.g.Wedidn’tgoshoppingasitwasrainingheavily.Itwasaverycoldnightandaterriblewindwasblowing.powersoundlythickbeathidetornadon.

电力供应；能量；力量adv.

（睡觉）酣畅地；可靠地；完全彻底地adj.厚的；浓密的v.

敲；打v.

躲藏；隐蔽n.

龙卷风；旋风Readthesentences.Underlinetheverbswhichshowanongoingactioninthepast.Whatwereyoudoingwhileitwassnowingheavily?Iwastravellingonthetrainthen.Whatwereyourfamilydoingwhenthetyphoonhit?MychildrenandIwerereadingtogether.Whenmyneighbourcalled,myfamilywerehavingdinner.Weweredrivinghomewhenthestrongwindsstarted.Whileweweredrivinghome,thestrongwindsstarted.Itwasraininghardwhileweweredrivingback.过去进行时中when和while的区别when可以表示时间点，也可以表示时间段，后面既可以+延续性动词，也可以+非延续性动词，时态既可以是一般过去时，也可以是过去进行时。E.g.Iwassleepingwhenthedoorbellrang.WhenIwasreadingEnglishwords,mymothercamein.Learnthetimeadverbialclausesguidedby"when"and"while"以when和while引导的时间状语从句1)延续性动词和非延续性动词延续性动词指动作可以延续一段时间，而不是瞬间结束。如：work、study、drink、eat等。非延续性动词指动作极为短暂，瞬间结束。如：start、begin、hit、jump、knock等。场景1：过去某一具体时刻正在进行的动作标志词：at8yesterday,atthatmoment,atthistimelastweek实例：At9p.m.lastnight,Iwaswatchingamovie.（昨晚9点，我正在看电影。）Whatwereyoudoingatthistimeyesterday?（昨天这个时候你在做什么？）练习：根据时间描述动作Whentherainstarted(昨天下雨时),I____________(walk)home.At9lastnight(昨晚9点),myfamily____________(watch)amovie.waswalkingwaswatching场景2：过去某一段时间内持续进行的动作标志词：from7to9,allmorning,thewholeafternoon实例：Shewaspracticingthepianofrom2to4yesterday.（昨天2点到4点，她一直在练钢琴。）Theywerecleaningthehouseallmorning.（他们整个上午都在打扫房子。）练习：根据时间描述动作1.Duringthesnowstorm,people

（stay）indoors.2.Whilethefloodwaterswererising,volunteers

（help）theelderly.werestayingwerehelpingLearntheusageofthereflexivepronouns.用法①when表示“当……的时候”。从句中既可用延续性动词，又可用非延续性动词，这些动词既可以表示动作，又可表示状态。从句中动作既可和主句的动作同时发生，又可在主句的动作之前或之后发生。如：MarywashavingdinnerwhenIsawher.Theboywasstillsleepingwhenhismothergothomeyesterdaymorning.②while表示“在……的时候”、“在……期间”。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句的动作过程中。while从句中必须是表示动作或状态的延续性动词。如：TheweatherwasfinewhilewewereinBeijing.ShecalledwhileIwasout.Whiletheboyswereplayingfootball,itrained.③如果主句的动作在从句的动作过程中发生，从句常用进行时。如:Learntheusageofthereflexivepronouns.主句从句长短短长长长whenwhen/whilewhilewhen/while+长:短:was/were+V-ing(过去进行时态)动词过去式(一般过去时态)作为背景的长动作（+when短动作）结构：长动作（进行时）+when+短动作（一般过去时）实例：IwaswalkingintheparkwhenIsawanoldfriend.（我正在公园散步时，看到了一位老朋友。）Theywerehavingdinnerwhenthephonerang.（他们正在吃晚饭时，电话响了。）练习：根据时间描述动作I

（read）abookwhenthephonerang.wasreading两个同时进行的过去动作结构：While+进行时，进行时实例：Whilemomwascooking,dadwassettingthetable.（妈妈在做饭时，爸爸在摆餐具。）Whilesomestudentswerereading,othersweretakingnotes.（一些学生在阅读时，另一些在做笔记。）练习：根据时间描述动作Whilethetyphoon

（approach）,people

（

board）uptheirwindows.wasapproachingwereboarding1.Ididmyhomework.Thetyphoonlandedonthecoast.2.Thepower

wentout.MyfatherandImadedinner.3.Katewrotealetter.Herbrothercalledtowarnherofthestorm.Combineeachpairofsentencesusingwhenorwhile.I

was

doing

my

homework

when

the

typhoon

landed

on

the

coast.The

powerwentout

while

my

father

and

I

were

making

dinner.Kate

was

writing

a

letter

when

her

brother

called

to

warn

her

of

the

storm.go

out(火或灯光)熄灭warn

sb.

of...

警告某人…

4.Myparentspackedthesupplies.Imovedourthingsoffthefloor.5.Isleptsoundly.Itrainedcatsanddogs.While

my

parents

were

packing

the

supplies,

I

was

moving

ourthings

off

the

floor.When

I

slept

soundly,

it

was

raining

cats

and

dogs.

rain

cats

and

dogs

下倾盆大雨Fillintheblankswiththecorrectforms.1.I___________(walk)toschoolwhenIsawacatinthetree.2._______(be)he_______(watch)TVat8lastnight?3.They______________(notplay)basketballwhilewewereplayingfootball.4.What_______you_______(do)atthistimeyesterday?5.Thewind_________(blow)hardwhilewe___________(stay)athome.6.She____________(dance)whenthemusicstopped.7.We____________(have)lunchwhenthephonerang.8._______they_______(run)ontheplaygroundat4yesterdayafternoon?9.He_______________(notread)abookwhilehissisterwasdrawing.10.Thesnow______________(fall)whenwewentout.waswalkingWaswatchingwerenotplayingweredoingwasblowingwerestayingwasdancingwerehavingWererunningwasnotreadingwasfalling选词填空（when/while）用when或while填空，完成短文

_______Iwastwelveyearsold,Ihadafunnyexperience.Oneday,I_______walkingtothelibrary_______Isawalittledogontheroad.Itlookedlost.Istoppedtohelpit_______itwasbarkingloudly.Justthen,awomancameover.Shesaidthedogwashers._______shewasthankingme,IfoundIwaslateforthelibrary.ButIwasstillhappytohelpthelittledog.WhenwaswhenwhileWhile：判断正误并改正

判断句子正误，对的打√，错的打×并改正1.HewaswatchTVwhenthedoorbellrang.(

)2.Wereyouplayfootballat4yesterdayafternoon?(

)3.Whilewewerewalking,weseeabeautifulbird.(

)4.Whentherainstarted,wewerehavingapicnic.(

)5.Theywerenotgotoschoolwhileitwassnowing.(

)6.Whatwereyoudoingatthistimelastweek?(

)×××√×√HewaswatchingTVwhenthedoorbellrang.Wereyouplayingfootballat4yesterdayafternoon?Whilewewerewalking,wesawabeautifulbird.Theywerenotgoingtoschoolwhileitwassnowing.whenvs.while过去进行时核心考点1.结构口诀：主语在前，was/were中间，v.-ing放后面2.三大用法：某时刻、某时段、两动作同时进行3.时间标志：atthistimeyesterday,from...to...yesterday4.句式变化：否定加not，疑问把was/were提前易混点核心口诀1.时态区分：持续未完成用过去进行，短暂已完成用一般过去2.连词区分：when管点又管段，while只管持续段3.连用技巧：短配长，任意放；两组长，用while核心区别：连词从句动词时态含义侧重示例when一般过去时

（短动作）时间点Whenhearrived,wewereeating.

（他到达时）