最新人教版八年级英语下册Unit-5-Grammar-focus公开课课件.ppt

1、Unit 5Grammar focusWhat were they doing when it began to rain?They were playing computer games when it began to rain.They were playing chess when it began to rain.They were playing football when it began to rain.While Jake was sleeping,what did his brother do?He played basketball.When Jake was sleep

2、ing,his brother played basketball.While they were dancing,the telephone rang.When the telephone rang,they were dancing.While they were dancing,what happened?He was singing when the baby started to cry.While he was singing,the baby started to cry.While he was walking,a taxi came.He was walking when a

3、 taxi came.Both of them mean“当当的时的时候候”.Are they the same?No！when and whilewhenwhen引导的时间状语从句可以表示一个时间引导的时间状语从句可以表示一个时间点点,也可以表示一个时间段。从句中可以用短也可以表示一个时间段。从句中可以用短暂性动词，也可以用延续性动词。暂性动词，也可以用延续性动词。lIt was snowing when we got to the airport.我们到达机场时，我们到达机场时，天正下着雪。天正下着雪。lMy key dropped on the ground when I was wal

4、king in the park.我在公园散步时，我在公园散步时，钥匙掉在了地上。钥匙掉在了地上。while引导的时间状语从句常指一个时间段引导的时间状语从句常指一个时间段,从句中的动词常为从句中的动词常为延续性延续性的。的。while有时还有时还可表示主句的动作与从句的动作同时发生。可表示主句的动作与从句的动作同时发生。lWhile he was reading,the phone rang.他正在看书时，电话铃响了。他正在看书时，电话铃响了。l Some students were reading while others were writing.一些学生在读书，另一些学生在写字。一些学

5、生在读书，另一些学生在写字。while1)若从句是一个若从句是一个短暂性动作短暂性动作，主句是一个，主句是一个持续性动作持续性动作，可用，可用 when 但不用但不用 while：It was raining hard when we arrived.我们到达时正下着大雨。我们到达时正下着大雨。2)表示主、从句正在进行的动作或状态的表示主、从句正在进行的动作或状态的对比时多用对比时多用while：While she was making a phone call,I was writing a letter.when 和和while 的区别的区别3)when 可用作并列连词，表示可用作并列连词

6、，表示“这时这时(突突然然)”，但，但while不可以；不可以；while 可以用作并列可以用作并列连词，表示连词，表示“而、却而、却”(表示对比表示对比)，但，但when没有这种用法。没有这种用法。We were about to start when it began to rain.He likes coffee,while she likes tea.1.I _(watch)TV when she _(call).2.When the phone _(ring),she _(write)a letter.3.While we _(have)a picnic,it _(start)to

7、rain.4.While John _(sleep)last night,someone _(steal)his car.was watchingcalledrangwas writingwere havingstartedwas sleepingstole5.While we _(wait)for the bus,a girl _(run)up to us.6.I _(telephone)a friend when Bob _(come)in.7.While mother _(make)the bed,the door bell _(ring).8.We _(test)the new mac

8、hine when the electricity _(go)off.were waitingwas runningwas phoningcamewere testingwentwas making rangTranslationTranslationTranslate the following sentences into English.1.当开始下雨的时候，我正和朋友们在操场当开始下雨的时候，我正和朋友们在操场上打篮球。上打篮球。I was playing basketball with my friends in the playground when it started to r

9、ain.2.我当时甚至不知道我正在做什么。我当时甚至不知道我正在做什么。I did not even know what I was doing at that time.3.当我妈妈在做晚饭的时候，我在卧室做作当我妈妈在做晚饭的时候，我在卧室做作业。业。I was doing my homework in the bedroom while my mother was cooking supper.4.当我今天早上看到她时，她正急匆匆地赶当我今天早上看到她时，她正急匆匆地赶去上班。去上班。When I saw her this morning,she was in a great hurry

10、 to go to work.()1.Mary _ a dress when she cut her finger.A.made B.is making C.was making D.makes 解析：解析：割伤手指是已发生的事情，应用过割伤手指是已发生的事情，应用过去时。同时，去时。同时，when表时间的同时性，表时间的同时性，“玛玛丽在做衣服时丽在做衣服时”提供事情发生的背景，因此提供事情发生的背景，因此用过去进行时。用过去进行时。C()2.While she _ the newspaper,Granny _ asleep.A.read;was falling B.was reading;

11、fell C.was reading;was falling D.read;fell 解析：解析：while“当当之时之时”。描述一件事发生的背景。描述一件事发生的背景时，用过去进行；一个长动作发生的时候，另一个短动时，用过去进行；一个长动作发生的时候，另一个短动作发生。句意为作发生。句意为“在她看报纸时，奶奶睡着了在她看报纸时，奶奶睡着了”。句。句中的中的 fell(fall的过去时的过去时)是系动词，后跟形容词，如是系动词，后跟形容词，如fall sick。过去进行时的基本用法过去进行时的基本用法:表示过去某个时刻或时表示过去某个时刻或时间正在进行过持续进行的动作间正在进行过持续进行的动作

12、,句中往往需要有时间状句中往往需要有时间状语来表示这一特定的时间。语来表示这一特定的时间。What were they doing just now?他们刚才在干什么他们刚才在干什么?BLook at the table and write sentences with both while and when.While John was taking photos,Mary bought a drink.John was taking photos when Mary bought a drink.While John was playing the piano,Mary left the

13、house./John was playing the piano when Mary left the house.While John was cleaning his room,Mary turned on the radio./John was cleaning his room when Mary turned on the radio.While John was shopping,Mary took the car to the car wash./John was shopping when Mary took the car to the car wash.Fill in t

14、he blanks with was,were,when or while.At 7:00 a.m.,I woke up._ I _ making my breakfast,my brother _ listening to the radio._ I was eating,the radio news talked about a car accident near our home.My brother and I went out right away to have a look._ we got to the place of the accident,the car _whilew

15、aswasWhileWhenwasin bad shape from hitting a tree.But luckily,the driver _ fine.The roads _ icy because of the heavy snow from the night before.waswere Miss Lin _ my desk-mate with her lessons when I left school.She is really a nice teacher.（2015福州）福州）A.helps B.is helping C.was helping(2011梧州梧州)I me

16、t a good friend of mine while I _ on the street A.walks B.walk C.was walking D.am walking CCWhat were you doing at 9 oclock last night?I was doing some housework.I was having dinner.Ask and answer.What were you doing between 7oclock and 9 oclock yesterday?I was doing my homework.I was watching TV.Wh

17、at was your father doing when you came back home yesterday?He was cooking.What was your brother doing when you saw him half an hour ago?He was playing computer games.What was Tom doing at that time last Sunday?He was playing the piano.He was riding a bike.How about David?What were they doing at that

18、 time last week?They were shopping.How about them?They were having a picnic.(过去进行时过去进行时)过去进行时表示过去某一时刻或某段过去进行时表示过去某一时刻或某段时间正在进行的动作。过去进行时由时间正在进行的动作。过去进行时由“was/were+动词动词-ing形式形式”构成。构成。1.过去进行时的各种句式过去进行时的各种句式:肯定句肯定句:主语主语+was/were+动词动词-ing形式形式否定句否定句:主语主语+was/were+not+动词动词-ing形式形式I was reading at this time

19、 yesterday.昨天这个时候我正在看书。昨天这个时候我正在看书。I wasnt reading at this time yesterday.昨天这个时候我没在看书。昨天这个时候我没在看书。疑问句疑问句:(1)一般疑问句一般疑问句:was/were+主语主语+动词动词-ing形式。肯定回答形式。肯定回答:Yes,主语主语+was/were.否否定回答定回答:No,主语主语+wasnt/werent.如：如：Were you reading at this time yesterday?昨天这个时候你在看书吗？昨天这个时候你在看书吗？Yes,I was./No,I wasnt.是的是的,我

20、在看。我在看。/不不,我没在看。我没在看。(2)特殊疑问句特殊疑问句:疑问词疑问词+was/were+主语主语+动词动词-ing形式。如：形式。如：What were you doing at this time yesterday?昨天这个时候你在做什么？昨天这个时候你在做什么？What was he researching all day last Sunday?上周日他一整天都在研究什么？上周日他一整天都在研究什么？(1)表示过去某一时刻或某一段时间内正在表示过去某一时刻或某一段时间内正在进行的动作进行的动作,常与时间状语常与时间状语at that time,at that moment

21、,at this time yesterday,at ten oclock yesterday等连用。如：等连用。如：2.过去进行时的基本用法过去进行时的基本用法:Were you playing basketball at four yesterday afternoon?昨天下午四点你们在打篮球吗昨天下午四点你们在打篮球吗?(2)表示在过去一段时间内持续进行的动作表示在过去一段时间内持续进行的动作(有有时也可以有间歇时也可以有间歇)。如：。如：We were watching TV from seven to nine last night.昨天晚上七点到九点的时候我们在看电视。昨天晚上七

22、点到九点的时候我们在看电视。She was singing from 7:00 to 7:30 last night.她昨晚七点至七点半在唱歌。她昨晚七点至七点半在唱歌。特殊用法特殊用法(1)常用于介绍故事的背景。如常用于介绍故事的背景。如:(2)when引导的从句表示一个短暂的时间点引导的从句表示一个短暂的时间点,谓语动词用一般过去时谓语动词用一般过去时,主句用一般过去时或主句用一般过去时或过去进行时；过去进行时；while引导的从句表示一段持续引导的从句表示一段持续的时间的时间,主句为一般过去时主句为一般过去时,从句谓语动词用从句谓语动词用过去进行时。如：过去进行时。如：Once an A

23、rab was traveling in the desert.从前从前,有个阿拉伯人在沙漠中旅行。有个阿拉伯人在沙漠中旅行。(3)过去进行时常与过去进行时常与always,continually等连等连用用,表示过去反复发生的行为动作，带有赞美、表示过去反复发生的行为动作，带有赞美、厌烦等感情色彩。如：厌烦等感情色彩。如：I was writing a letter when he came in.当他进来时，我正在写信。当他进来时，我正在写信。The telephone rang while she was washing.当她正在洗衣服时，电话响了。当她正在洗衣服时，电话响了。He wa

24、s continually asking her questions.他一直在问她问题。他一直在问她问题。一般过去时与过去进行时的动作都是一般过去时与过去进行时的动作都是发生在过去。一般过去时强调动作的发发生在过去。一般过去时强调动作的发生或状态的存在在过去；而过去进行时生或状态的存在在过去；而过去进行时强调动作正在进行的延续性，其结构强调动作正在进行的延续性，其结构:was/were+v.-ing过去进行时与一般过去时的区别过去进行时与一般过去时的区别 试比较试比较:I got up at five the day before yesterday.前天我是五点起床的。前天我是五点起床的。H

25、e was painting the lab the whole day.他一整天都在粉刷实验室。他一整天都在粉刷实验室。一般过去时的时间状语主要有：一般过去时的时间状语主要有：yesterday(morning,afternoon,evening),last night(week,month,year),ago,the day before yesterday,in 2003,just now,long,long ago等等过去进行时的时间状语有过去进行时的时间状语有:at this/that time yesterday,the whole evening,all day yesterda

26、y等。试比较等。试比较:He introduced Tom to us just now.刚才他向我们介绍了汤姆。刚才他向我们介绍了汤姆。She was doing some washing all day yesterday.昨天她一整天都在洗衣服。昨天她一整天都在洗衣服。Underline the correct form of the verbs.1.Suddenly,all the lights in my house were going off/went off.There was heavy rain outside.2.-I called you up at seven ocl

27、ock last night,but nobody answered it.-Really?Im sorry,but I was teaching/taught a piano lesson at school.3.-I was seeing/saw you and Tom in the library just now.-Oh,we showed/were showing several visitors around the school.What were you doing at these times last Sunday?Fill in the chart.Then ask yo

28、ur partner.YouYour partner9:00 a.m.11:30 a.m.4:00 p.m.9:00 p.m.用所给词的适当形式填空用所给词的适当形式填空1.I _(help)my mother with housework at ten oclock last Sunday.2.The girl _(have)a piano lesson at this time yesterday.was helpingwas having3.They _(talk)about the film when the teacher came in.4.While he _(wait)for

29、the bus,he read a newspaper.5.He said he was _(leave)for Shanghai soon.were talkingwas waitingleaving.句型转换句型转换1.Kate was drawing pictures when her mother came back.（改为否定句）（改为否定句）Kate _ _ pictures when her mother came back.2.She was babysitting her sister at this time yesterday.（改为一般疑问句）（改为一般疑问句）_ sh

30、e _ her sister at this time yesterday?wasnt drawingWas babysitting3.They were having a party when I knocked at the door.（就划线部分提问）（就划线部分提问）_ _ they _ when you knocked at the door?What were doing.用用when或或while填空填空1.What were you doing _ the earthquake happened?2._ I was shopping in the supermarket,I m

31、et my friend Nancy.whenWhile3.I was sleeping _ my cousin came to see me.4.My mother was doing the housework _ I was doing my homework.5._ the alien was in the shop,the girl called the police.when whileWhile1.What _(be)you _ (do)when he arrived?2.Jim _ (sleep)when I came in.3.They _ (watch)TV at 8:00

32、 yesterday evening.4.Now he _(read)and _.were doing was sleeping were watching is reading writingA.Fill in the blanks with the given A.Fill in the blanks with the given words.words.B B.Translate these sentences into Translate these sentences into English.English.1.上课铃响时，你在干什么？上课铃响时，你在干什么？What _ you

33、_when the class bell rang?2.当我妈妈进来时我正在看书。当我妈妈进来时我正在看书。I _when my mother came in.3.昨天晚上十点钟她正在做饭。昨天晚上十点钟她正在做饭。She _ at ten oclock _.weredoingwas readingwas cookinglast night/yesterday evening4.当天当天开始下雨时开始下雨时,孩子们孩子们正在玩游戏正在玩游戏。The children _ games when it _ to rain.5.当我当我进来时进来时，那只猫那只猫逃跑了逃跑了。The cat _ wh

34、en I _.were playing beganran awaycame in 6.飞机在飞机在伦敦着陆时伦敦着陆时,天天正下着雨正下着雨。It _ when the plane _ in London.7.电话电话铃响的时候铃响的时候,我我正在吃早饭正在吃早饭。I _ breakfast when the telephone _.8.琳达睡觉时琳达睡觉时发生了什么事发生了什么事？_while Linda was sleeping?was raininglandedwas having rangWhat happened()1.I called you last night,but you

35、didnt answer.Sorry,Grace.I _ I am A Singer when the phone rang.（2015长沙）长沙）A.am watching B.was watching C.have watchedB中考链接中考链接()2.I called you at half past nine this morning,but there was no answer.Oh,sorry.I _ with my cousin in the supermarket.（2015克拉玛依）克拉玛依）A.shopping B.was shopping C.shopped D.wi

36、ll shopB()3.Our classmates went to a concert yesterday afternoon.What a pity!I _ my homework.（2015泰安）泰安）A.had done B.was doing C.am doing D.would doB()4.Lucy,what were you doing at nine last night?I _ the piano.I usually practice the piano at that time.（2015襄阳）襄阳）A.play B.played C.was playing D.am p

37、layingC()5.Millie _ a picture when Mr Green came in.(2013江苏徐州江苏徐州)A.draw B.will draw C.drew D.was drawing()6.What _ you _ when the captain came in?(2013黑龙江齐齐哈尔黑龙江齐齐哈尔)A.are;doing B.did;do C.were;doingDC()7.Mr.Li _ to Mary carefully when I entered the classroom this morning.He is very patient _ he is

38、 young.(2013广东梅州广东梅州)A.talking;but B.was talking;though C.talks;though D.talked;however B()8.When Jims mother came in,he _ his homework.(2013湖南长沙湖南长沙)A.is doing B.has doneC.was doing C()9.Was Kate at the party last night?Yes,she _ a really nice dress.(2013江江苏盐城苏盐城)A.is wearing B.was wearing C.would

39、wear D.has wornB()10.Sam,what will the weather be like tomorrow?Sorry,Mum.I didnt watch the weather forecast just now.I _ a football match.(2013 浙江衢州浙江衢州)A.was watching B.am watching C.would watch D.will watchA()11.I was at the cinema at nine oclock yesterday evening.What about you?I _ TV at home.(2012贵州铜仁贵州铜仁)A.am watching B.was watching C.will watch D.watchedB()12.Jenny _ in the kitchen when you called her at 5 oclock this afternoon.(2012广东广东)A.is cooking B.was cooking C.cooks D.CookedB