Unit12SectionA（GrammarFocus-4c）课件人教版英语九年级.pptx

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1、Unit 12Life is full of the unexpected.Review and preparation Look at the pictures and talk about Marys day.overslepttook a shower got to the bus stop ran to schoolleft her backpack ran back to schoolgot back to school class started123456781. Tim went into the bathroom. Mary got up._2. The coffee bec

2、ame cold. I put cream in the coffee._ 4a Make sentences using by the time or before.By the time Mary got up, Tim had already gone into the bathroom.Before I put cream in the coffee, the coffee had become cold.2.The teacher collected the math homework. I got to school._ 3.I completed the work for my

3、boss. The workday ended._ By the time I got to school, the teacher had collected the math homework.By the time the workday ended, I had completed the work for my boss.4.The movie started. I arrived at the cinema._ 5.My mother finished making the apple pie. I got home from my language course._By the

4、time I arrived at the cinema, the movie had started.By the time I got home from my language course, my mother had finished making the apple pie.1.By the time I arrived at the party, everyone else_ already _ .2.When he put the noodles into a bowl, he realized he _to add the green beans.4b Fill in the

5、 blanks with the correct forms of the words in the box.rush out forget arrive atgo into show up find outhadshown uphad forgotten3.By the time my mother came back from the market, I already _ the door to go for my piano lesson.4. Before she got to the airport, she _ about the earthquake.5. When she _

6、 the movie theater, she remembered she had forgotten to feed her dog. 6. Before she got a chance to say goodbye, he _ the building.had rushed outhad forgottenarrived athad gone into1.By the time I left for school in the morning,_ 2.By the end of the school day, _ 3. By dinner time, I _4c Write two t

7、rue statements and one false statement about your day yesterday. Then ask your classmates to guess the false statement.Grammar FocusWhen I got to school, I realized that I had left my backpack at home.By the time I got to school, the bell had rung.Before I got to the bus stop, the bus had already le

8、ft.I was about to go up to my office when I decided to get a coffee first.As I was waiting in line with the other office workers, I heard a loud sound. 表示过去某一时间或动作以前已经表示过去某一时间或动作以前已经发生或完成了的动作。它表示动作发生发生或完成了的动作。它表示动作发生的时间是的时间是“过去的过去过去的过去”。 表示发生在过去的动作对过去的某表示发生在过去的动作对过去的某一点造成的某种影响或结果，用来指定一点造成的某种影响或结果，用来

9、指定在另一个过去行动之前就已经完成了的在另一个过去行动之前就已经完成了的一个事件。一个事件。Finish the task1. 过去完成时的构成：过去完成时的构成：_+_2. 过去完成时表示：过去完成时表示： _ _3. 过去完成时常与过去完成时常与_等引导的时间等引导的时间状语连用。状语连用。had过去分词过去分词when, before, by the time 过去某一时刻或动作之前已经发生或过去某一时刻或动作之前已经发生或完成的动作。完成的动作。1)当我到达学校的时候，我才意识到我把书包忘在家里了。当我到达学校的时候，我才意识到我把书包忘在家里了。 _ I got to school,

10、 I realized that I _ _ my backpack at home. 2)到我返回学校的时候，铃声已经响过了。到我返回学校的时候，铃声已经响过了。 _ _ _ I got back to school, the bell _ _.WhenhadleftBy the time had rung3)我到达公共汽车站之前，我到达公共汽车站之前， 汽车已经离开了。汽车已经离开了。 Before I _ _ the bus stop, the bus _ _ _.4)我决定先买一杯咖啡，然后再去办公室。我决定先买一杯咖啡，然后再去办公室。 I _ _ _ go up to my off

11、ice when I decided to get a coffee first.got to hadalready left was about to5)就在我和别的工作人员一起排队等候的时候，听到了一个巨大的就在我和别的工作人员一起排队等候的时候，听到了一个巨大的声响。声响。 As I _ _ _ _ with the other office workers, I _ _ _ _. was waiting in line heard a loud sound When I got to school, I realized that I had left my backpack at h

12、ome. By the time I got back to school, the bell had rung. Before I got to the bus stop, the bus had already left.由由when, by the time, before等引导时间状语等引导时间状语从句时，若描述发生在过去的事，主句常用从句时，若描述发生在过去的事，主句常用过去完成时过去完成时(had + 过去分词过去分词)表示动作发生在表示动作发生在过去的过去。过去的过去。 I was about to go up to my office when I decided to get

13、 a coffee first. As I was waiting in line with the other office workers, I heard a loud sound.be about to do, be doing等表示即将等表示即将或正在做某事时，常用或正在做某事时，常用when引导从引导从句表示突然发生的动作。句表示突然发生的动作。【实战演练实战演练】 用所给词的适当形式填空。用所给词的适当形式填空。 1. When I got there the bus _ (go). 2. By the time I got to class, the teacher _ (st

14、art) teaching. 3. We _ (learn) over 1,000 words by the end of last term.4. I _ (clean) the room before he arrived here. had gonehad startedhad learnthad cleanedby the time 的用法的用法by the time 意为意为“到到时候时候(为止为止)”，是，是一一个介词短语，在句中常起到连词的作用，个介词短语，在句中常起到连词的作用，引导时间状语从句。引导时间状语从句。1.如果如果从句中的谓语动词是一般过去式，那从句中的谓语动词是一

15、般过去式，那么主句的谓语动词通常用过去完成时么主句的谓语动词通常用过去完成时，表，表示示“截止到从句动作发生时，主句动作已截止到从句动作发生时，主句动作已经完成，即过去的过去经完成，即过去的过去”。例：例：By the time you came back, I had finished this book. 你回来时我已经把这本书看完了。你回来时我已经把这本书看完了。 （从句谓语动词（从句谓语动词came back 为一般过去为一般过去 时，所以主句动作用过去完成时时，所以主句动作用过去完成时had finished, 表示过去的过去。）表示过去的过去。）2. 如果如果从句中的谓语动词为一般

16、现在时或从句中的谓语动词为一般现在时或现在完成时，那么从句中的谓语动词常用现在完成时，那么从句中的谓语动词常用将来完成时将来完成时，表示，表示“截止到将来的某一时截止到将来的某一时刻为止，主句动作将已完成。刻为止，主句动作将已完成。”例：例：By the time I get home, they will have left. 我到家时他们将已经离开。我到家时他们将已经离开。 By the time I graduate next year, I will have lived here for five years. 到明年毕到明年毕 业时，我将已经在这待了五年了。业时，我将已经在这待了五

17、年了。（1） by the end of +时间点时间点意为意为“到到结束结束时时” +过去过去的时间点，主句用的时间点，主句用过去完成过去完成时；时；例：例：By the end of last year, I had stayed in Xian for seven years. 到去年结束时，我到去年结束时，我 已经在西安待了已经在西安待了7年了。年了。 +将来将来的时间点，的时间点， 主句用主句用将来完成将来完成时；时；例：例：By the end of next month, I will have finished my new book. 到下个月结束时我到下个月结束时我 将要完

18、成我的新书。将要完成我的新书。(2) by+时间点时间点意为意为“到到为止；截止为止；截止时时” +现在的时间点，主句用现在完成时；现在的时间点，主句用现在完成时；例：例：By now, I have finished all my homework. 截止现在，我已经完成了所有的作业。截止现在，我已经完成了所有的作业。 +过去的时间点，主句用过去完成时；过去的时间点，主句用过去完成时；例：例：By yesterday, the building had been completed. 截止昨天，这个建筑就已经完成了。截止昨天，这个建筑就已经完成了。 +将来的时间点，主句用将来完成时。将来的时

19、间点，主句用将来完成时。例：例：By tomorrow, all the students will have been out of the school. 到明天所有的学生到明天所有的学生 都将离校。都将离校。一、根据句意及汉语提示完成单词。一、根据句意及汉语提示完成单词。1. Please put some _ (奶油) on the bread.2. We need four bananas to make banana _(果馅饼).3. Cocoa _(豆) are used to make some kinds of drink.4. Would you like to go t

20、o the _(集市) to buy some food with me?5. My father doesnt allow me to play computer games on _(工作日).creampiesbeansmarketweekdays二、根据句意，用括号中所给单词的适当形式填空。1Alice said she _ _ (not find) her new pen yet.2When Bob arrived home，he realized someone _ _ (break) into his house.3My friends _ (take) many photos

21、before I got to school.4I began watching here an hour ago，but till now nothing _ _ (happen)5By the time he got to the cinema，the film _ _ (be on) for ten minutes.hadnt foundhadnt foundhad brokenhad brokenhad takenhad takenhad been onhad been onhas happenedhas happened三、单项选择。1Most of my good friends

22、_ when I _ at the party.Aleft；had arrivedBhad left；arrivedCleft；arrived Dhad left；had arrived2You didnt watch the movie?Yes，but by the time I _ to the cinema，the movie _ for several minutes.Agot；has begun Bgot；had been onCgot；had begun Dgot；has been on3_ last month，I had planted six trees.ABy the en

23、d of BAt the end ofCIn the end DTo the endB BB BA A4Why was he late for school yesterday?He overslept.By the time he got to the bus stop，the bus _ already _Awas；leaving Bhas；leftCwould；leave Dhad；left5She told me that she _ a cold for three days.Ahas caught Bhad had Chas had Dhad caughtD DB B二、根据汉语意

24、思及所给提示完成句子。二、根据汉语意思及所给提示完成句子。1. 在我们做出最后的决定前，他已经弄清了我们所需的 所有信息。(find)Before we made a final decision, he _ all the information we needed.had found out2. 房子着火时，他们已经冲了出去。(rush)By the time the house began to burn, they _.had rushed out3. 我来教室之前就已经看完了这本书。(finish)I _ the book before I came to the classroom.had finished reading4. 到家后，她才意识到她把手机落在出租车里了。(leave)After she arrived home, she realized that she _ her mobile phone in the taxi.had left5. 玛丽起床时，蒂姆已进入了浴室。(go)By the time Mary got up, Tim _ the bathroom.had gone into