1、Unit 12 Life is full of the unexpected.Section A Grammar Focus 4c九年级全一册 人教版Learning GoalsWarming UpGrammarSummaryExercises1 12345通过本课的学习，学生能够：了解过去完成时态（初中课标未作要求），复习一般过去时态。运用各时态描述自己生活中发生的事情。Learning GoalsWarming UpLets first enjoy a video.What is the song about?What tense will we use when telling a st
2、ory happened long ago?It tells a story about a princess asleep.Past tense.When I got to school,I realized that I had left my backpack at home.By the time I got back to school,the bell had rung.Before I got to the bus stop,the bus had already left.I was about to go up to my office when I decided to g
3、et a coffee first.As I was waiting in line with the other office workers,I heard a loud sound.默读“语法聚焦”表格中的例句，找出例句中运用的不同时态。Presentation一般过去时过去完成时过去将来时过去进行时Discussion 这些句子，为什么分别使用一般过去时和过去完成时？在使用不同时态时，这些句子的动作有什么先后顺序？宾语从句，主句一般过去时，从句动作发生在主句之前，用过去完成时。When I got to school,I realized that I had left my back
4、pack at home.by the time/before+一般过去时的时间状语从句，主句动作发生在从句之前，主句用过去完成时By the time I got back to school,the bell had rung.Before I got to the bus stop,the bus had already left.when引导的时间状语从句用一般过去时，主句表示decided的时候马上要做的事情，发生在decided这个动作之后，用过去将来时。I was about to go up to my office when I decided to get a coffee
5、 first.As 引导的时间状语从句用过去进行时，主句表示was waiting那个时间发生的动作，表示过去某个时间发生的动作，主句用一般过去时As I was waiting in line with the other office workers,I heard a loud sound.过去完成时由“助动词had(用于各种人称和数)+过去分词”构成，表示某动作或状态在过去某一时间或动作之前已经发生或完成，它表示动作发生的时间是“过去的过去”。过去完成时过去的过去过去某时现在将来（先发生）（后发生）过去完成时从过去之前的某个时间点到过去的某个时间点为止1.过去完成时的句式结构(1)肯定
6、句：(2)否定句：(3)一般疑问句：肯定回答：否定回答：过去完成时主语+had+过去分词+其他.主语+hadnt+过去分词+其他.Had+主语+过去分词+其他?Yes,主语+had.No,主语+hadnt.(1)表示一个动作或状态在过去某一时间动作之前已经发生或完成，常与by、before等构成的时间短语连用。2.过去完成时的用法He told me that he had met her the night before.Before I arrived at the airport,the plane had already taken off.(2)常用在said、told、knew、h
7、eard、realized等后面的宾语从句中。在我到达机场前，飞机已经起飞了。他告诉我他在前一天晚上已经见过她了。(4)过去完成时是一个相对的时态，只有和过去的某个时间或动作相比较时才会用到，因此可通过分析语境来确定时态。(3)在含有when、before等引导的时间状语从句的复合句中，如果从句的时态为一般过去式，主句常用过去完成时。Most of the guests had left by the time he arrived at the party.他到达聚会的时候，大部分的客人已经走了。Helen had left her keys in the office so she had
8、 to wait until her husband came home.海伦把钥匙忘到办公室里了，因此她不得不等她丈夫回来。4a.Make sentences using by the time or before.1.Tim went into the bathroom.Mary got up.By the time Mary got up,Tim had already gone into the bathroom.2.The coffee became cold.I put cream in the coffee._3.The teacher collected the math ho
9、mework.I got to school._By the time I put cream in the coffee,it had become cold.Before I got to school,the teacher had collected the math homework.Practice4.I completed the work for my boss.The workday ended._5.The movie started.I arrived at the cinema._ 6.My mother finished making the apple pie.I
10、got home from my language course._By the 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.Before the workday ended,I had completed the work for my boss.4b.Fill in the blanks with the correct forms of the wor
11、ds in the box.rush outforgetarrive at go intoshow up find out1.By the time I arrived at the party,everyone else _ already_.2.When he put the noodles into a bowl,he realized he _ toadd the green beans.3By the time my mother came back from the market,I_already_ of the door to go to my piano lesson.had
12、showed uphad forgottenhadrushed out4Before she got to the airport,she _ about the earthquake.5When she_ the movie theater,she remembered she had forgotten to feed her dog.6Before she got a chance to say goodbye,he_ the building.had found outarrived athad gotten intorush outforgetarrive at go intosho
13、w up find out4c.Write two true statements and one false statement about your day yesterday.Then ask your classmates to guess the false statement.1.By the time I left for school in the morning,_2.By the end of the school day,_3.By dinner time,I _I realized that I had left my keys at home.I had alread
14、y finished my homework.had made the egg soup.Production一、单项选择。1.Tom was disappointed that most of the guests _ when he _ at the party.A.left,had arrived B.left,arrived C.had left,had arrived D.had left,arrived2.We _ four thousand new words by the end of last year.A.had learned B.have learned C.learn
15、ed D.will have learnedD A Exercises3.The pen I _ I _ is on my desk.A.think,lost B.thought,had lost C.think,had lost D.thought,have lost 4.Did you see Mr.Smith when you were in France?No,when I _ France,he _ to China.A.had arrived,had gone B.arrived to,wentC.got to,had gone D.had got to,would go5.Cat
16、herine _ the letter before her mother came into her bedroom.A.had writtenB.was writtenC.has writtenD.is writingB C A 6.I have bought you the books you wantOh,good,I_afraid you had forgottenA.wasB.amC.had beenD.have been7.Why didnt Tom attend the meeting yesterday?He_BeijingA.has gone to B.had gone t
17、o C.went to D.had been to8.The bus had gone when I _ at the bus stopA.have arrived B.arrived C.had arrived D.am arrivingA B B 9.The police found that the house _and a lot of things_.A.has broken into,has been stolen B.had been broken into,had been stolenC.has been broken into,stolen D.had been broke
18、n into,stolen10.We _the work by six yesterday evening.A.finished B.would finish C.had finished D.had been finishedB C 二、翻译下列句子。1.到了六点钟为止，他们已经工作了八小时了。_2.我到广州时，他在那里很长时间了。_3.他告诉我说他的队伍已经赢了。_4.她说她仍没去过长城。_By six oclock they had worked for eight hours.When I came to GuangZhou,he had been there for a long time.He told me that his team had already won.She said that she hadnt gone to the Great Wall yet.Grammar:过去完成时用法：过去的过去 结构：助动词had(用于各种人称和数)+过去分词Summary
