人教八下Unit5when和while的用法和區(qū)別（共16張）

時(shí)間狀語(yǔ)從句中when和while的用法及區(qū)別課程內(nèi)容：

課程目標(biāo)1.時(shí)間狀語(yǔ)從句中when的含義及用法2.時(shí)間狀語(yǔ)從句中while的含義及用法3.when和while的用法區(qū)分（重點(diǎn)）

導(dǎo)入你能找出句子中的狀語(yǔ)么？Shestudieshardintheuniversityeveryday.Shestudieshardintheuniversityeveryday.

導(dǎo)入狀語(yǔ)——謂語(yǔ)動(dòng)詞的狀態(tài)，包括時(shí)間、地點(diǎn)、原因、狀態(tài)、目的、結(jié)果、方式、程度等。

導(dǎo)入Shestudieshardintheuniversityeveryday.時(shí)間狀語(yǔ)時(shí)間狀語(yǔ)從句Shestudieshardwhenshewasintheuniversity.主句

從句

When表示”當(dāng)…時(shí)候”。主句用過(guò)去進(jìn)行時(shí)。從句中既可以用延續(xù)性動(dòng)詞,又可以用非延續(xù)性動(dòng)詞,這些動(dòng)詞既可以表示動(dòng)作,又可以表示狀態(tài)。從句中的動(dòng)作既可和主句動(dòng)作同時(shí)發(fā)生,又可在主句動(dòng)作之前或之后發(fā)生。tH:MarywashavingdinnerwhenIsawherTheboywasstillsleepingwhenhismothergothomeyesterdayevening知識(shí)卡片一：whenMarywasstudyingwhenIsawher.John

was

sleeping

whenhismothergothomeyesterdayevening.Maryboughtagift

WhenJohnwastakingphotos.含義when為“當(dāng)...的時(shí)候”多用一般過(guò)去時(shí)也可用過(guò)去進(jìn)行時(shí)when引導(dǎo)時(shí)間狀語(yǔ)從句用法-Mom，I'mhungryI'dlikesomethingtoeat．-Oh，dear．Here'ssomebread.A.such；thatB.so；that例題講解1.Mr.Greenwastalkingonthephone___Iarrivedathisoffice.

A.whenB.afterC.whereA-Mom，I'mhungryI'dlikesomethingtoeat．-Oh，dear．Here'ssomebread.A.such；thatB.so；that知識(shí)卡片二:whileMr.Johnson

calledme

whileIwasdoingmyhomework.TheweatherwasfinewhileweweretravellinginBeijing.含義While表示“在....時(shí)候”、“在…期間”。Theweatherwasfinewhilewe

travelledinBeijing.While引導(dǎo)的時(shí)間狀語(yǔ)從句用法從句多用進(jìn)行時(shí)不可用一般過(guò)去時(shí)-Mom，I'mhungryI'dlikesomethingtoeat．-Oh，dear．Here'ssomebread.A.such；thatB.so；that例題講解1.Tedfelloffhisbicyclewhilehe______itandhurthimself.A.wasridingB.rodeC.wereridingD.rideA

綜合練習(xí)1.Hewasabouttogotobed________thedoorbellrang.

A.whileB.beforeC.when

2._______JohnwaswatchingTV,hiswifewascooking.A.AfterC.WhileC.Until3.Hereachedtheschoolgate________thebellrang.A.whileB.whenC.since-Mom，I'mhungryI'dlikesomethingtoeat．-Oh，dear．Here'ssomebread.A.such；thatB.so；that知識(shí)卡片三：區(qū)別主從句時(shí)態(tài)角度觀察下列句子并總結(jié)whenwhile用法：1.Itwasrainingheavilywhen

wearrived.2.Theboyfellasleep

when/whileIwasreading.3.Iwasdoinghomeworkwhilemymotherwascooking.時(shí)態(tài)區(qū)分

應(yīng)用練習(xí)whenVSwhile1._________Iarrivedhome,motherwascooking.2._________shewastalking,hersisterwalkedin.2._________Ifoundmydog,itwasplayingwithanotherdog.4._________Iwasdancing,hewassingingloudly.Summary1When可指時(shí)間點(diǎn),又可指時(shí)間段,從句中可用延續(xù)性動(dòng)詞,也可用非延續(xù)性動(dòng)詞。2While總是指一個(gè)時(shí)間段,從句中必須用延續(xù)性動(dòng)詞。3統(tǒng)一時(shí)態(tài):主句過(guò)去式,從句也是過(guò)去式一、動(dòng)詞角度1.When=duringthetimeoratthetime從句中可用延續(xù)性動(dòng)詞,也可用非延續(xù)性動(dòng)詞；2.While=duringthetime，從句中必須用延續(xù)性動(dòng)詞。when和while拓展區(qū)分注：能夠區(qū)分延續(xù)性和非延續(xù)性動(dòng)詞的學(xué)生補(bǔ)充Summary1When可指時(shí)間點(diǎn),又可指時(shí)間段,從句中可用延續(xù)性動(dòng)詞,也可用非延續(xù)性動(dòng)詞。2While總是指一個(gè)時(shí)間段,從句中必須用延續(xù)性動(dòng)詞。3統(tǒng)一時(shí)態(tài):主句過(guò)去式,從句也是過(guò)去式二、主從句動(dòng)作關(guān)系角度when和while拓展區(qū)分1.Itwasrainingheavilywhen

wearrived.2.Theboyfellasleep

when/whileIwasreading.3.Iwasdoinghomew