資源描述：
《英語(yǔ)人教版八年級(jí)下冊(cè)Unit5 Grammar Focus.ppt》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫(kù)。
1、Unit5GrammarfocusWhatweretheydoingwhenitbegantorain?Theywereplayingcomputergameswhenitbegantorain.Theywereplayingchesswhenitbegantorain.Theywereplayingfootballwhenitbegantorain.WhileJakewassleeping,whatdidhisbrotherdo?Heplayedbasketball.WhenJakewassleeping,hisbrotherplayedbasketball.Whilethey
2、weredancing,thetelephonerang.Whenthetelephonerang,theyweredancing.Whiletheyweredancing,whathappened?Hewassingingwhenthebabystartedtocry.Whilehewassinging,thebabystartedtocry.Whilehewaswalking,ataxicame.Hewaswalkingwhenataxicame.Bothofthemmean“當(dāng)……的時(shí)候”.Aretheythesame?No?。。henandwhilewhenwhen引導(dǎo)
3、的時(shí)間狀語(yǔ)從句可以表示一個(gè)時(shí)間點(diǎn),也可以表示一個(gè)時(shí)間段。從句中可以用短暫性動(dòng)詞，也可以用延續(xù)性動(dòng)詞。Itwassnowingwhenwegottotheairport.我們到達(dá)機(jī)場(chǎng)時(shí)，天正下著雪。MykeydroppedonthegroundwhenIwaswalkinginthepark.我在公園散步時(shí)，鑰匙掉在了地上。while引導(dǎo)的時(shí)間狀語(yǔ)從句常指一個(gè)時(shí)間段,從句中的動(dòng)詞常為延續(xù)性的。while有時(shí)還可表示主句的動(dòng)作與從句的動(dòng)作同時(shí)發(fā)生。Whilehewasreading,thephonerang.他正在看書時(shí)，電話鈴響了。Somestudentswerereadingwh
4、ileotherswerewriting.一些學(xué)生在讀書，另一些學(xué)生在寫字。while1)若從句是一個(gè)短暫性動(dòng)作，主句是一個(gè)持續(xù)性動(dòng)作，可用when但不用while：Itwasraininghardwhenwearrived.我們到達(dá)時(shí)正下著大雨。2)表示主、從句正在進(jìn)行的動(dòng)作或狀態(tài)的對(duì)比時(shí)多用while：Whileshewasmakingaphonecall,Iwaswritingaletter.when和while的區(qū)別3)when可用作并列連詞，表示“這時(shí)(突然)”，但while不可以；while可以用作并列連詞，表示“而、卻”(表示對(duì)比)，但when沒有這種用法。Wewe
5、reabouttostartwhenitbegantorain.Helikescoffee,whileshelikestea.Practice1.I______________(watch)TVwhenshe_______(call).2.Whenthephone_______(ring),she___________(write)aletter.3.Whilewe____________(have)apicnic,it_________(start)torain.4.WhileJohn____________(sleep)lastnight,someone_______(ste
6、al)hiscar.waswatchingcalledrangwaswritingwerehavingstartedwassleepingstole5.Whilewe____________(wait)forthebus,agirl____________(run)uptous.6.I____________(telephone)afriendwhenBob__________(come)in.7.Whilemother___________(make)thebed,thedoorbell____________(ring).8.We____________(test)thene
7、wmachinewhentheelectricity________(go)off.werewaitingwasrunningwasphoningcameweretestingwentwasmakingrangTranslationTranslatethefollowingsentencesintoEnglish.1.當(dāng)開始下雨的時(shí)候，我正和朋友們?cè)诓賵?chǎng)上打籃球。Iwasplayingbasketballwithmyfriendsintheplaygroundwhenitstar
