Unit12 Section A 4a～4c 第三课时课件2025-2026学年人教版九年级英语全册

Life is full of the unexpected. Unit12 Section A 4a-4c Objectives 1.语言能力： 理解和掌握本课新词cream，workday，show up，bean，market；在讲解中理解、识记运用本课时的语法知识过去完成时。 2.思维品质： 归纳总结过去完成时的定义等考点，并与之前学过的时态进行对比，培养学生逻辑性思维。 3.学习能力： 能运用讲授法和归纳总结法，让学生体会过去完成时在英语中的运用，掌握其定义，构成，判断依据以及和其他时态的区别。 充满 到达 正要做某事 即使；尽管 与..一起排队等待 继续;发生 盯着某人 / 某物 不信；怀疑地 从床上跳下来 闹钟发出响声 Review be full of arrive at/in be about to do sth.  even though  wait in line with ...  go on  stare at sb. / sth.  in disbelief  jump out of bed go off  直奔机场 心中想；盘算 等到第二天 听说 前一天 变成 Review go straight to the airport  think to oneself  wait till the next day  hear about/of  the day before  turn into  Read the timeline and make sentences. The plane hit the World Trade Center. 8:46AM Review waited in line with... __________we were waiting in line with other office workers,the plane hit the World Trade Center. As/When (主从句动作同时发生) ________________we joined the others to see what’s going on,the plane had hit the World Trade Center. 8: 48AM joined the others to see what’s going on By the time/Before (主句动作发生在从句之前) Read the timeline and make sentences. The plane took off. ________________I got to the airport,the plane had taken off. got to the airport (主句动作发生在从句动作之前) Review By the time/Before By the time/Before The Past Perfect 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 get a coffee first. As I was waiting in line with the other office workers, I heard a loud sound. Classify them according to different tenses. Grammar focus 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. 从句是一般过去时 主句动作发生在从句之前,用过去完成时。 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. 在以上的时间状语从句中，主句和从句的动作是同时发生，或者是在 进行一个动作时，另外一个动作突然发生。可用一般过去时或过去进行时表示。 Make a summary 过去的过去 过去某时 现在 将来 过去完成时 定义：用来描述在过去某一时间或动作之前已经发生或完成了的动作。(过去的过去) 过去完成时 构成：助动词had (用于各种人称和数) + 过去分词 肯定句：主语 + had + 过去分词 + 其他. 否定句：主语 + hadn’t + 过去分词 + 其他. 一般疑问句：Had+ 主语 + 过去分词 + 其他? 肯定回答：Yes, 主语 + had. 否定回答：No, 主语 + hadn’t. eg:When I woke up，it had stopped raining. 当我醒来的时候，雨已经停了。 否定句： 一般疑问句： When I woke up，it hadn’t stopped raining. Had it stopped raining when you woke up? Yes,it had. No,it hadn’t. 句式 判断依据 ① by+过去的时间点 She had finished reading the book by 9 o’clock yesterday. 到昨天9点钟前，她已经读完了这本书。 ② by the end of+过去的时间点 在...结束时(前) We had completed all the work by the end of last month. 到上个月月底，我们已经完成了所有工作。 由时间状语判定 判断依据 在含有when, before,by the tine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。 1. When I got there, the bus _________ (go).  2. By the time I got to class,  the teacher__________(start) the class.   3.我到达公共汽车站之前， 汽车已经离开了。 Before I _____ _____ the bus stop, the bus ____ _____ _____. 由时间状语从句判定 had gone had started got to had already left 判断依据 过去完成时经常用于主句为一般过去时的宾语从句中, 表示从句动作先于主句动作发生, 像在told, said, knew, heard, thought 等动词后的宾语从句中。 由宾语从句判定 1.He told me that his team ______ already _______ (win). 他告诉我说他们队已经赢了。 2.She said that she _____________(not go to) the Great Wall yet. 她说她仍没去过长城。 had won hadn’t been to 判断依据 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。 由语境判定 1. I went to Tom’s house but he __________ (go) out. 我去Tom家，但是他出去了。 2. The children ran away because they ___________ (break) the window. 孩子们跑开了，因为他们打破了窗户。 had gone had broken 补充 过去完成时还可以表示从过去的某一时刻开始，一直持续到过去另一时间的动作或状态。  标志词：常与for 、since 构成的时间状语连用 1.When we got to the cinema, the movie ______ for ten minutes. A. has been on B. had been on C. had begun D. began 2.I ________ English for three years before coming to this school. A. is studying B. have studied C. studied D. had studied B D New words&expressions cream workday show up bean market n. 奶油；乳脂 n. 工作日 感到；露面 n. 豆；豆荚 n.市场；集市 4a Make sentences using by the time or before. 1. Tim went into the bathroom. Mary got up. ____________________________________ ____________________________________ 2. The coffee became cold. I put cream in the coffee. __________________________________ __________________________________ Before I put cream in the coffee, the coffee had become cold. By the time Mary got up, Tim had already gone into the bathroom. 4a Make sentences using by the time or before. 3. The teacher collected the math homework. I got to school. ________________________________________ ________________________________________ 4. I completed the work for my boss. The workday ended. ________________________________________ ________________________________________ By the time I got to school, the teacher had collected the math homework. I had completed the work for my boss before the workday ended. 4a Make sentences using by the time or before. 5. The movie started. I arrived at the cinema. __________________________________ __________________________________ 6. My mother finished making the apple pie. I got home from my language course. ______________________________________ ______________________________________ ______________________________________ The movie had started before I arrived at the cinema. By the time I got home from my language course, my mother had finished making the apple pie. 4b Fill in the blanks with the correct forms of the words in the box. 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. 3. By the time my mother came back from the market, I ______ already __________ of the door to go to my piano lesson. rush out forget arrive at go into show up find out had shown up had forgotten had rushed out 4. Before she got to the airport, she _____________ about the earthquake. 5. When she _________ the movie theatre, she remembered she had forgotten to feed her dog. 6. Before she got a chance to say goodbye, he _____________ the building. arrived at had gone into had found out rush out forget arrive at go into show up find out 易错点 1.句中有yesterday, last year, in 2019, two weeks ago 等明确表示 过去的时间状语时, 常用一般过去时, 而不用过去完成时。 I bought some vegetables yesterday. 2.叙述过去连续发生的两件及两件以上的事情时, 虽然时间上有 先后之别, 但仍用一般过去时。 He got up at 8 a.m. , brushed his teeth and washed his face. 他八点起床，刷牙，接着洗脸。 易错点 2. 现在完成时表示 动作发生在过去，但侧重对现 在产生的结果或造成的影响，与现在有关。或者是过去 的动作持续到现在。 结构为：“助动词 have（has）+done” eg：I have had the backpack for 5 years. 我已经买了这个背包五年了。 5 years ago have had now $