Unit 8 Safe and sound Grammar课件- 2025-2026学年译林版（2024）初中英语八年级上册

Unit6Safe and soundUnit8Grammar学习目标通过本节课的学习，同学们能够:1.感知并总结过去进行时的构成规则。2.在语境中识别并且使用过去进行时。3.了解并且掌握when, while以及as引导的时间状语从句的用法。4.了解在暴风雪等恶劣天气中的一些注意事项,保护自我。What is Tom doing?What is Lucy doing?现在进行时：am/is/are + doingWarming up Tom/He is playing football.Lucy/She is reading a book.What was Tom doing at that moment?What was Lucy doing at 2:30 p.m. yesterday?过去进行时:was/were + doingTom/He football. Lucy/She a book.was readingwas playingwas playingwas readingLead in Why don’t we use “is doing”?Because we talk about things that happen in the past(在过去)not nowLead in Past continuous tenseShe was playing computer games at this time last night.They were playing basketball when I walked past the playground.He was reading newspaper from 8 to 9 yesterday morning. Was she talking at that time?No, she was not talking at that time.Work out the rule!was/wereRead the conversation below and pay attention to the use of the past continuous tense.Suzy: There was an accident near our school at 4:10 yesterday afternoon. It happened as we were going home from school.Amy: I know. I saw it while I was riding my bike home. It was raining when the police arrived.Suzy: I didn’t see it. I hope no one was badly hurt.过去进行时表示在过去某一时刻正在进行的动作或过去某一阶段一直在进行的动作。Tom was playing football at that time.They were watching TV at 2:30 p.m yesterday.We were singing a song then?过去进行时nowpast二、过去进行时的句式结构一、过去进行时的构成过去进行时句子中的谓语部分由“was/were+ 现在分词” 构成，与现在进行时结构相似，只是把现在进行时中的am/is/are 变成了was/were。三、时间状语 过去进行时表示过去某一时刻正在进行的动作以及过去某一阶段一直在进行的动作,常与表示过去的具体时间等连用如:this morning, the whole morning, all day, from nine to ten, last evening, at that time,at this time yesterday, at 9 last night, at that moment。或者在when,while, as引导的时间状语从句中使用。过去进行时和一般过去时的区别:1.过去进行时:强调过去某一时刻或时间段内正在进行或持续的动作。e.g. He was playing basketball at three yesterday afternoon.昨天下午三点他正在打篮球。2.一般过去时:表示动作发生在过去，且往往已经完成。e.g. He played basketball yesterday afternoon. 昨天下午他打篮球了。【对点练习】1. He _______________ when you came.2. You ______________ when the telephone rang.3. We ________________ TV at ten last night.4. They ______________ football at this time yesterday.5. I ______________ my car from 4 to 5 on Monday afternoon.6. She ______________ dinner at that time.was sleeping were readingwere watching were playing was cooking was washing When, while and as can be used as conjunctions of time. They all mean “during the time that...”.I was working when the earthquake started.People were running in all directions while pieces of glass and bricks were raining down.As I was trying to find my way out, I suddenly heard some noise above me.When a shorter action happened at the same time as a longer action, we use the past continuous tense for the longer action and the simple past tense for the shorter action. When there are two long actions, we often use while.Using while, when and asWe were watching in fear while the firemen were putting out the fire.If the shorter action is in the main clause, we can use when, while or as to join the clauses.When/While/As Millie was watching TV, the lightning hit her building.If the longer action is in the main clause, we often use when to join the clauses.Millie was watching TV when the lightning hit a nearby building.when, while和as 用作从属连词,都有“当……的时候”之意,引导时间状语从句,它们的用法和区别如下：1)when, while和as这三个词均有“当……时候”的意思There were fewer sandstorms when my grandparents were young. 我祖父母年轻时沙尘暴要少些。While Millie was watching TV, her mum was sleeping.米莉在看电视时她妈妈在睡觉。I saw a traffic accident as I was riding to school this morning.今天早晨我骑车上学时看见一起交通事故。While, when, as 的用法2)when和as既可以指某一点时间,也可以指某一段时间,其从句谓语动词表示的动作既可以是瞬间性的,也可以是延续性的;while指一段时间,从句中的谓语动词必须是延续性的。即:指一段时间时，when，while和as都可用； 指一点时间时，只能用when或as，不能用while。试比较：When/As he woke up, it was eight o'clock. ( √)While he woke up, it was eight o'clock. ( × )When/While/As I was waiting for a bus, I met her. ( √ )3)when引导的从句的谓语动作可以在主句谓语动作之前,之后或同时发生；While和as引导的从句的谓语动作必须是和主句谓语动作同时发生。When he finished his homework,he played the computer games for a while.当他完成作业后,他玩了会儿电脑游戏。(finished先发生)When I got to the museum, the door was closed.(got to后发生)While/As I was sleeping, the telephone rang.(was sleeping 和rang同时发生)4)当主句、从句动作同时发生且主句动作为瞬间动作,从句动作为延续性动词时, when、while和as都可使用。When/While/As we were reading,a stranger came in.当我们正在看书时,一位陌生人走了进来。(read为延续性动词)5)强调过去的两个动作同时进行(主句与从句均为延续性动词),常用“过去进行时+while+过去进行时”结构。如：They were rowing boats while we were climbing the hill.当我们在爬山时,他们在划船。6)强调某个动作发生的时候,另一个动作正在进行,常用“一般过去时+while/when/as+过去进行时”结构。如：It began to rain heavily while/when /as we were having dinner.我们在吃晚饭时，开始下起大雨。7）强调某个动作正在进行时，另一个动作突然发生，常用“过去进行时+when+一般过去时”结构。如：I was walking in the street when he called me.我正在街上走时，他突然喊我。9）在将来时从句中，常用when，且从句须用一般时代替将来时。When the manager comes here for a visit next week, I’ll talk with him about this．下周经理来这参观时,我会和他谈谈此事。 用when、while或as填空。1. It began to rain ______________ Linda was having supper.2. What were you doing _____ Mr Jackson came into the classroom?3. ______________ you are driving, don’t use your mobile phone.4. We were having a meeting ______ the light went off.5. I was looking after the child ______ Jenny was cooking lunch.6. _________ I arrived at his office, he was chatting on the phone.【对点练习】when/while/aswhenWhen/While/AswhenwhileWhen/AsAnother snowstorm hit Harbin. Simon is asking his grandpa about it. Complete their conversation with the correct forms of the verbs in brackets.Simon: Hello, Grandpa. How was your day?Grandpa: Not bad. Thank you, Simon. We just had the third snowstorm of this winter. It (1) ____________ (get) stronger while I (2) _____________ (read) the newspaper at about 7 this morning. What about you, Simon?Simon: We’re all very well, Grandpa. It (3) ______________ (snow) here in Beijing when we went to the Palace Museum during the day. Lots of people (4) ________________ (enjoy) the beauty of the Palace Museum in the snow.Grandpa: Sounds nice. Maybe I (5) _______________ (watch) the wonderful view on TV while you (6) _____________ (visit) there.Simon: Yeah, it was really wonderful. Come and take a look by yourself next time. was getting was readingwas snowingwere enjoying was watching were visitingSimon’s cousin Vicky is writing about the snowstorm. Complete her article with the correct forms of the verbs in brackets.Joy after the snowstorm Harbin woke up to a winter wonderland last week. There was a big snowstorm.When I got up on Saturday morning, it (1) ___________(snow) heavily. The wind (2) __________(blow) hard all morning, but that just meant more time for fun inside with my family.It stopped snowing in the afternoon. Guess what I did? I built a snowman! I (3) ____ (draw) a big smile on his face, put my hat on his head and took a photo. When it was almost time for dinner, I went home. Some people in the neighbourhood (4) ___________ (clear) the snow from the streets.When I got home, my parents (5) ___________(get) dinner ready. While we (6) ____________(enjoy) our meal, it began to snow again. It was so nice to have hot jiaozi on a cold day! was snowingwas blowing drewwere clearing were gettingwere enjoyingWrite about an emergency or a natural disaster that happened in your hometown, or one you heard about, using the past continuous tense.Last July, a bad rainstorm came to my hometown. I remember what I was doing when it started. It was 3 p.m. I was in my bedroom doing my math homework. The sky got very dark. Suddenly, strong winds blew. My little sister was watching TV in the living room. She cried because the wind was loud. My mom was cooking in the kitchen. She turned off the stove and closed the windows fast.​The rain fell harder and harder. It hit the roof with big noises. My dad was calling grandma to check if she was safe. She was at her house nearby alone.​While we waited, the lights went out. We were a little scared but stayed calm. Mom lit candles. We sat together and told stories until the rain got lighter.​The storm stopped at 7 p.m. We went outside. Some trees were on the road, and bikes were knocked over. But everyone was okay. It was scary, but I learned we need to stay together in hard times.Work in groups Work in groups to write about an emergency or a natural disaster that happened in your hometown,or one you heard about, using the past continuous tense.Show Time当堂检测 选词填空(可重复使用)  1. I ______________ TV last night ________ the phone rang.  2. While my mother _____________ dinner, my father was reading a newspaper.  3. He ____________ football ________ it suddenly began to rain.  4. ________ the storm came, we were walking home.  5. She ______________ her room when the earthquake ________.  6. While they _____________ about the accident, the teacher came in.  7. ________ I was doing homework, my brother was listening to music.  8. The fire ___________ while the workers were working.  was watchingwhenwas cookingwas playingwhenWhenwas cleaningstartedwere talkingWhilehappened9. He _____________ me with my English when the bell rang.  10. ________ the rain stopped, we were still waiting for the bus.  11. She _____________ in the park while her dog was running around.  12. While Tom _____________ a cake, his sister was watching him.  13. The students ______________ when the fire alarm went off.  14. _______I saw her, she was talking to a policeman.  was helpingWhenwas runningwas makingwere talkingWhenTHANKS本课结束