2014-2015学年高中英语配套课件：UNIT 2 PERIOD 3（北师大版必修一广东专用）.ppt

1、Unit 2 Heroes Period ThreeGrammar 课件（北师大版必修1，广东专用）(1)表示说话人原来没有料到、想到或希望的事通常用过去时。I thought the film would be interesting，but it isnt.我原以为这部电影会有趣，但并不是。(2)如果从句中有一个过去的时间状语，尽管从句中的动作先于主句发生，但从句中的谓语动词也用过去时。He told me he read an interesting novel last night.他告诉我他昨晚看了一本有趣的小说。(3)表示两个紧接着发生的动作，常由but，and，when，as s

2、oon as，immediately，the moment，the minute等连接，用一般过去时。The moment she came in，she told me what had happened to her.她一进来就告诉我发生在她身上的事。He bought a watch but lost it.他买了一块表，但是丢了。2过去进行时的用法过去进行时表示过去某一时刻正在进行的动作，也表示过去某一段时间一直进行的动作。由“was/werev.ing”构成。My mother was watching TV when I got home.当我到家的时候妈妈正在看电视。She wa

3、s watching TV all the evening.她整个晚上都在看电视。It was raining during the whole match.整个比赛期间都在下雨。3同一句中过去进行时和一般过去时的用法当过去进行时和一般过去时出现在同一个句子中时，过去进行时通常用来描述事件发生的背景，而一般过去时通常描述具体事件。I was walking along the street when，suddenly，a stranger stopped me.我正走在大街上，这时突然一个陌生人拦住了我。We were driving along a country road when a c

4、ar drove past us.我们行驶在一条乡村公路上，这时一辆车从我们旁边驶过。4现在完成时的用法现在完成时表示在说话之前已完成的动作，但与现在仍有着密切的联系，强调对现在产生的结果或影响。Ill not go to see the film tonight，because I have seen it.我今天晚上不去看电影了，因为我已经看过了。Have you ever seen the sea?你见过大海吗？而且还有可能再持续下去。We have studied English for six years.我们学了6年的英语。She has taught us English sin

5、ce I came to this school.我来到这个学校以来，她一直教我们英语。现在完成时表示从过去某个时间开始到目前为止这一段时间内反复发生的动作或多次出现的状态。这种现在完成时通常与often，always，every week，many times等时间状语连用。My father has always gone to work by bike.我父亲一向骑自行车上班。Six times he has tried and six times he has failed.他尝试了6次，6次都失败了。现在完成时还可以用在时间状语从句或条件状语从句中，表示将来某时将要完成的动作。Don

6、t get off the bus until it has stopped.等车停稳后才下车。I will go and see him as soon as I have finished my work.我一做完工作就去看他。(1)现在完成时除可以和for，since引导的状语连用外，还可以和下面的介词短语连用：during/in/over the last(past)few years(months，weeks)，in recent years等。(2)下列句型中常用现在完成时It is(has been)一段时间since从句This(That/It)is the first(sec

7、ond.)time that完成时This(That/It)is the only/the best.that完成时【单项填空】1I had been working on math for the whole afternoon and the numbers _ before my eyes.Aswim Bswum Cswam Dhad swum答案C句意：整个下午我都在做数学题，眼前全是数字。and后的句子陈述“过去那个时刻的事实”，故用一般过去时。2Did you catch what I said?Sorry.I _ a text message just now.Ahad answ

8、ered Bhave answeredCwould answer Dwas answering答案D考查时态。答语句意：抱歉，我刚才在回短信。故用过去进行时表示刚才在进行的动作。3Look！Somebody _ the sofa.Well，it wasnt me.I didnt do it.Ais cleaning Bwas cleaningChas cleaned Dhad cleaned答案C考查动词时态。句意：看！有人把沙发打扫过了。哦，不是我。我没有打扫。“把沙发打扫过了”强调对现在的影响，现在沙发是干净的，故用现在完成时。4I _ along the street looking f

9、or a place to park when the accident _.Awent；was occurring Bwent；occurredCwas going；occurred Dwas going；had occurred答案 Cbe doing.when结构中when从句谓语用过去时。5Shirley _ a book about China last year but I dont know whether she _ it.Ahas written；finished Bwrote；has finishedChad written；will finished Dwas writi

10、ng；has finished答案D“去年在写”用过去进行时，“不知道写没写完”用完成时。6Where_the recorder？I cant see it anywhere.I_it right here.But now its gone.Adid you put；have put Bhave you put；putCwere you putting；had put Dhad you put；put答案B问句中找不到是“放在哪里”对现在的影响用完成时，而答句“放在”用过去时。7 When tomatoes were first brought to an exhibition from Am

11、erica，people thought they_red apples.Awere buying Bhad boughtCwould buy Dbought答案 A“人们认为是在买苹果”用过去进行时。8Every possible means_to prevent air pollution，but the sky is still not clear.Ais used Bare usedChas been used Dhave been used答案 C“一切可能的办法都已用过了”用现在完成时。9How can you possibly miss the news？It_on TV all

12、 day long.Ahas been Bhad been Cwas Dwill be答案 A“这条新闻报道一整天了”用现在完成时。10Didnt Tom notice you?No.He_with Tina.Aplayed Bwas playingCdidnt play Dhad played答案 B“他那时正和Tina玩”用过去进行时。11The book has been translated into thirty languages since it _ on the market in 1973.Ahad come Bhas come Ccame Dcomes答案Csince引导的

13、从句作状语时，主句通常用完成时而从句通常用一般过去时，所以选C项。12For many years，people _ electric cars.However，making them has been more difficult than predicted.Ahad dreamed of Bhave dreamed ofCdreamed of Ddream of答案B句意：许多年来，人们都一直梦想着电动汽车。然而，制造它们比想象的要难得多。根据句中的for many years和后一句的时态可知，此处应用现在完成时。13When you are home，give a call to l

14、et me know you _ safely.Aare arriving Bhave arrivedChad arrived Dwill arrive答案B此题可以使用排除法。动词arrive既可以使用现在进行时表示将来，也可以用willdo表示将来，因此同时排除A和D；C为过去完成时，使用过去完成时时，句中一定要有一般过去时，过去完成时表示过去的过去，因此排除C。故选B。句意：当你到家的时候，打电话给我让我知道你已经平安抵达。14Excuse me.I _ I was blocking(堵)your way.Adidnt realize Bdont realizeChavent realized Dwasnt realizing答案A结合语境可知，此处表示的是说话之前没有意识到挡住了对方的路，因此用一般过去时。15Up to now，the program _ thousands of children who would otherwise have died.Awould save BsavesChad saved Dhas saved答案 D句意：截止到现在，这个项目已经挽救了成千上万的本来会死去的孩子的生命。up to now是现在完成时的标志，所以空格处应使用现在完成时。