欢迎来到天天文库
浏览记录
ID:62065126
大小:475.00 KB
页数:32页
时间:2021-04-14
《最新9A-Unit-4-Grammar-(I)教学讲义PPT.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、9A-Unit-4-Grammar-(I)afterbeforeatanearliertimethanatalatertimethanAUsingbefore,after,whenandwhile一.beforeandafterHowtousebeforeBeforemeansearlierthanacertaintimea.表示“在…..之前就…..”。Maryhadfinishedherhomeworkbeforehermotherreturned.b.表示“过了多久后才…,动作进行到什么程
2、度才……”Themanalmostknockedmedownbeforehesawme.Theywalkedabout30milestothewestbeforetheysawavillage.Theyworkeddayandnightaboutthreedaysbeforeeverythingreturnedtonormal.c.表示“刚…就…”Ihadhardlysatdownbeforethebellrang.d.表示“不知不觉就…..;还没弄清就……”Timepassedquicklya
3、ndthreemonthswentbybeforeTomknewit.e.after还可用作副词,意为“后来”或“(一段时间)以后”,通常要放在另一时间副词之后。如:Wearrivedsoon(或just/shortly)after.我们不久就到了。Hereturnedtwentyyearsafter.20年后他回来了。二.whenandwhile1.Howtousewhenandwhilea.whenmeansatorduringacertaintime既指时间点,也可指一段时间;whilem
4、eansduringacertaintime只指一段时间,因此when引导的时间状语从句中的动词可以是终止性动词,也可以是延续性动词,而while从句中的动词必须是延续性动词。b.when说明从句的动作和主句的动作可以是同时,也可以是先后发生;while则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。c.由when引导的时间状语从句,主句用过去进行时,从句应用一般过去时;如果从句和主句的动作同时发生,两句都用过去进行时的时候,多用while引导如:1).Whentheteach
5、ercamein,weweretalking.当此句改变主从句的位置时,则为:Whileweweretalking,theteachercamein.2).Theyweresingingwhileweweredancing.d.when和while还可作并列连词。when表示“在那时”;while表示“而,却”,表对照关系。如:1).Thechildrenwererunningtomovethebagofricewhentheyheardthesoundofamotorbike.孩子们正要跑过去
6、搬开那袋米,这时他们听到了摩托车的声音。2).Heisstrongwhilehisbrotherisweak.他长得很结实,而他弟弟却很瘦弱。三.Exerciseone.I:HelpDavidcombinehissentencesusingbefore,after,whenorwhile.1.Igojoggingeverymorning.ThenIhavebreakfast.2.Ipractisedplayingbasketballforhours.Ifelttiredout.3.ImetPet
7、er.Iwaswaitingatthebusstop.4.IwaswatchingTV.Ireceivedacallfrommyuncle.5.Iwasreadytogotobed.Myfathercamebackfromwork.IgojoggingeverymorningbeforeIhavebreakfast.AfterIpractisedplayingbasketballforhours,Ifelttired.ImetPeterwhile(Iwas)waitingatthebusstop
8、.While(Iwas)watchingTV,Ireceivedacallfrommyuncle.Iwasreadytogotobedwhenmyfathercamebackfromwork.II:PutthesesentencesintoEnglish.1.He__________thereforaboutayear_______theNBA_______________him.2._____he________,he__________toplayinanotherbasketballlea
此文档下载收益归作者所有