Unit5 Grammar 课件-2025-2026学年人教版英语八年级下册

UNIT 5 Nature’s temper ? BIG Question How do natural disasters affect our lives? Section A What happens during a natural disaster? Grammar understand the structure of the past continuous tense. In this part, you will learn to use the past continuous tense properly and describe past events with past continuous tense. understand the difference between the simple past tense and the past continuous tense. ➷➷ ➷ ➷ ➷ ➷ ➷ ➷ ➷ ➷ Past continuous tense Focus on 用法 Julia called her brother yesterday around 8 pm, but he didn’t answer. Look at the pictures and guess what was going on. He __________(sit) and _________ (watch) TV. Suddenly, there ____ (be) a fire in Mrs Brown’s apartment. was was sitting watching She ________(lie) down and ________ (bleed 流血). was bleeding Let’s watch to check your answer. 过去进行时的基本结构为：was/were+V-ing 用来表示过去某个时刻或某一时段正在进行的动作。 was lying 4a Read the sentences. Underline the verbs which show an ongoing action in the past. P45 过去进行时-part1 过去进行时表示在过去某一时刻或某一段时间内进行或发生的动作。 ① I was watching TV at eight last night. 昨晚八点我正在看电视。 ② He was writing stories the whole morning. 他整个早上都在写故事。 常和表示过去的时间状语连用，如： at this time yesterday/ at 9:00 last night/ the whole morning 等。 1. 定义 2. 用法 I was having breakfast at 7:00 am yesterday. (1) 过去进行时表示过去某一时刻正在进行的动作。时间点可以用介词短语、副词或从句来表示，也可由上下语境暗示。 7:00 am yesterday From 1982 to 1998, she was teaching at Yale. (2) 过去进行时表示过去某阶段一直在进行的动作。 from 1982 to 1998 ① Everyone was enjoying the coffee. Then a man entered the shop. ② Everyone was enjoying the beautiful weather that morning. Some people were swimming in the sea, and some were relaxing on the beach. (3) 过去进行时可用来为一个或一系列动作的发生提供背景。 大家都在享用咖啡，这时有位男人进了商店。 那天早上，大家都在享受美好的天气。有人在海里游泳，有人在沙滩上放松。 ① She was eating breakfast at 6 am yesterday. ② We weren't watching TV at that time. ③ - Were you playing basketball at that time? - Yes, we were. / No, we weren't. ④ What were you doing at 7:00 last night? 3. 结构 肯定句: 主语+was/were +V-ing+其他. 否定句: 主语+wasn't/weren't +V-ing+其他. 一般疑问句: Was/Were +主语+V-ing+其他? Yes, 主语+was/were. / No, 主语+wasn't/weren't. 特殊疑问句：疑问词+was/were+主语+V-ing? 4. 短暂性动词，如decide、stop等。 有些动词通常不用于进行时，主要有： 1. 表示心理状态、情感的动词，如love、hate、like、know等。 2. 部分连系动词，如seem、appear等。 3. 感官动词，如see、hear、feel、smell、sound、taste 等。 It was ten o’clock on Sunday morning. The family were all in the garden. Mr King and Mrs King ___________ (sit) under the tree, and they ___________ (talk) and ________ (laugh). Their son Jack ___________ (read) an interesting book. Their daughter Wendy ___________ (play) with their dog. Everyone was happy. 用所给动词的适当形式填空。 were sitting were talking laughing was reading was playing * A car accident happened 15 minutes ago ______ the man __________________ the street. * A car ________________ from the car park ______ a van(厢形 货车) came towards it. * The van driver ____________ dangerously at full speed. * It seems that the van driver ____________ _______ driving and didn’t notice the car. was walking down was pulling out was driving was texting while when while 过去进行时可以和 ______, ______等引导的时间状语从句连用，形成复合句。 when while Let’s learn more. Watch and fill in. 过去进行时-part2 The past continuous with some adverbial clauses (when, while) 过去进行时既可以用在主句中，也可以用在从句中，还可以同时用在主句与从句中。 We were visiting our relatives when the strong winds started. While they were waiting, the little girl started to cry. I was doing some chores while my mother was preparing lunch. 从上面例句可以看出，持续时间长的动作一般用过去进行时，持续时间短的常用一般过去时。如果主句和从句都用过去进行时，则表示主句和从句中的动作都持续了一段时间。 when和while引导的时间状语从句区别 I： ① One day, when Henry was working in a restaurant, a snake suddenly appeared and bit his hand. ② I was trying to pick it up when it bit me again. ③ While I was driving my old car, I was polluting the city. 从句动词 所指时间 when引导的时间状语从句 while引导的时间状语从句 可以是终止性动词，也可以是延续性动词 必须是延续性动词 可表示时间点或一段时间 通常表示一段时间 when和while引导的时间状语从句区别 Ⅱ ： I was trying to pick it up when it bit me again. 我正想过去抓住它，又被咬了一口。 在包含由when引导的时间状语从句的复合句中，若主句用过去进行时、从句用一般过去时，则表示一个动作正在进行的时候另一个动作(突然)发生了，强调后一动作发生的突然。 ① We were talking when the teacher came in.  ② While we were talking, the teacher came in. 我们正在讲话，老师(突然)进来了。 我们正在讲话的时候，老师进来了。(只表示老师进来的事实，不强调突然性。) when和while引导的时间状语从句区别 Ⅲ ： 当主句和从句的动作都是延续性的或同时发生的，两句都用过去进行时的时候，通常用while引导从句。 ① They were singing while we were dancing.  他们在唱歌，我们在跳舞。 ② They were reading while we were writing. 他们在读书，我们在写字。 ③ Wang Qi was watching TV while his parents were preparing dinner. 王琦在看电视，而他的父母正在准备晚餐。 4b Combine each pair of sentences using when or while. P45 1. I did my homework. The typhoon landed on the coast. 2. The power went out. My father and I made dinner. 3. Kate wrote a letter. Her brother called to warn her of the storm. 4. My parents packed the supplies. I moved our things off the floor. 5. I slept soundly. It rained cats and dogs. I was doing my homework when the typhoon landed on the coast. While my father and I were making dinner, the power went out. / My father and I made dinner when the power went out. Kate was writing a letter when her brother called to warn her of the storm. / While Kate was writing a letter, her brother called to warn her of the storm. While my parents were packing the supplies, I was moving our things off the floor. / My parents were packing the supplies, while I was moving our things off the floor. I was sleeping soundly while it was raining cats and dogs. 过去进行时-part3 一般过去时与过去进行时的比较 ① He read a book last night. 昨天晚上他读了一本书。(读完了) ② He was reading a story book last night. 昨天晚上他正在读故事书。(可能读完了，也可能没有读完) 一般过去时 过去进行时 相同点 表示过去发生的动作 不同点 表示过去的时间里发生的动作，往往已经完成 表示过去某一时刻或时段正在进行的动作 一般过去时和过去进行时的区别： 4c Complete the passage with was, were, when, or while. P45 When Jenny looked up, thick black clouds were forming in the sky, and the rain ______ beating against their roof. "Quick, this way," said Dad. The family ran to the safe room at once. ______ they were waiting, Jenny's little sister started to cry. Dad gave her some chocolate and told her that they ______ hiding from an angry lion. Soon, she was laughing again. At last, the storm passed. ______ they stepped outside, they found the sun shining. People were asking one another if they were safe while some ______ starting to clear the streets. Jenny smiled. The tornado was scary, but it also brought everyone closer together. was While were When were Jenny’s family experienced a natural disaster. Let’s read to see what happened. 4c Imagine that you are a reporter. Interview a member of Jenny's family and find out what he or she was doing around the time of the tornado. P45 A: What were you doing when the tornado hit? B: My family and I were hiding in a safe room. A: What were you doing while you were waiting there? B: Oh, while I ... 直击中考 单项选择。 1. (2025年北京市) Marry ______ a picture when her dad got home yesterday evening. A. draws B. was drawing C. is drawing D. will drawing 2. (2025年北京市) - Peter, did you play table tennis with your friends after school yesterday? -No, I didn’t. We ___ vegetables in our school garden. A. water B. have watered C. watered D. are going to water 直击中考 3. (2025年天津市) The mobile phone ____ when I was making a cake with my mother. A. rang B. rings C. is ringing D. is going to ring 4. (2025年陕西，完型填空) When Nana woke up the next morning, the sunshine _____ in through her bedroom window. A. is shining B. shines C. was shining D. will shine Ⅱ. 根据句意，用when、while填空。 1. ________ we got to Nanning, it was raining. 2. The teacher was playing the piano ________ the students were singing. 3. _______________ the students were cleaning the classroom, the head teacher arrived. 4. _____ we were having dinner, the lights went out suddenly. 5. Jim was playing football on the playground ______ it began to rain. When while When/While While when 1. Do you understand the structure of the past continuous tense? 2. Can you use the past continuous tense with adverbial clauses (when, while) correctly? 27 You must 1. Review the use of past continuous tense. 2. Preview Section B on pages 46-47. You choose to Imagine you are a reporter. Interview a classmate and find out what he or she was doing around a time of a natural disaster or a bad weather. Then write a short passage about it, using the past continuous tense. Homework $