Unit 4 Growing up Grammar 课件 2025-2026学年译林版（2012）九年级英语上册

该初中英语课件聚焦before, after, when, while等引导的时间状语从句，从定义及示例切入，先解析before/after的动作先后关系，再通过when短暂性动词与while延续性动词的对比搭建学习支架，衔接后续since, till/until等拓展用法。 其亮点在于结合实例辨析与任务驱动，通过“when/while用法对比表”“句子标注任务单”等培养思维品质，借助“before/after+doing”转换练习提升语言能力，助力学生构建语法体系，教师可高效开展分层教学。

Unit 4 Growing up Grammar 时间状语从句是指在复合句中充当时间状语的句子。如: When the weather is good, my grandpa likes going fishing. 当天气好的时候,我爷爷喜欢去钓鱼。 The sun came out after the storm stopped. 暴风雨停止后,太阳出来了。 注意: 我们可以用before, after, when和while引导时间状语从句,这些词既可放在句首,也可放在句中。 before,after,when和while 引导的时间状语从句 E.g. After he graduated, he was forced to play in another basketball league. after means _ than a certain time. earlier later You should turn off the lights before you leave the room. = You should turn off the lights before leaving the room. Time passed quickly and three months went by before I knew it. Tom went to school after he finished his breakfast. = Tom went to school after finishing his breakfast. The sun came out after the storm stopped. before/after+句子=before/after + doing sth. the subject of the main sentence and that of the time clause are the same. When before的意思是“在……之前”,表示主句动作发生在从句动作之前。如: Close the windows before you leave the room, please. 在你离开房间前,请关上窗。 after意思是“在……之后”,表示主句的动作发生在从句的动作之后。如: I went to school after I finished my breakfast. 我吃完早饭去上学。 when意思是“当……时候” 1) 表示主句动作发生的时候,从句的动作也发生了,或者表示两个动作先后紧接着发生,常用于两个短暂性动词。如: The days get longer when spring comes. 春天到来时,白天变长了。 When I got home yesterday, it began to rain. 昨天我到家时,天开始下雨了。 E.g. When he finally got the chance, he scored 20 points in his first game. when means _ a certain time. at or during when意思是“当……时候” 3) 表示主句动作在进行的时候,从句的动作发生了,主句动作用延续性动词,从句动作用短暂性动词。如 When the teacher came in, they were talking. 老师进来的时候,他们正在说话。 when意思是“当……时候” 2) 表示主句动作发生的时候,从句的动作正在进行,主句动作用短暂性动词,从句动作用延续性动词,这时while 可以用when替换。如: 当男孩子们踢足球时,天开始下雨了。 When the boys were playing football, it began to rain. =While the boys were playing football, it began to rain. E.g. While (he was)attending junior high, Spud tried out for the school team. while means _ a certain time. during 短暂性/延续性 延续性 The days get longer when spring comes . When my sister is sweeping the floor, I was washing the dishes. While my sister is sweeping the floor, I was washing the dishes. . When While At a certain time—时间点 During a certain time—时间段 During a certain time—时间段 My First Template The days get longer when spring comes. 短暂性 延续性 V When/While my sister is sweeping the floor, I was washing the dishes. When When/While I go to jogging every morning. Then I have breakfast. _ 2. I practised playing basketball for hours. I felt tired out. _ 3. I met Peter. I was waiting at the bus stop. _ 4. I was watching TV. I received a call from my uncle. _ 5. I was ready to go to bed. My father came back from work. _ A.Finish the exercises on Page 54. I go jogging every morning before I have breakfast. After I practised playing basketball for hours, I felt tired out. After I practised playing basketball for hours, I felt tired out. After I practised playing basketball for hours, I felt tired out. After I practised playing basketball for hours, I felt tired out. Practice1 Fill the blanks with “when”&“while” Practice1 when when (1).The days get longer _ spring comes. (2)._ the boys were playing football, it rained. (3).I was about to leave _ the phone rang. (4).Jack is strong _ his brother is weak. (5)._ (she is) in trouble, she always asks me for help. When/While When/While while 1. I have been crazy about playing basketball _ I was a little boy. 2. The weather has been awful this week. The rain did not stop _ yesterday evening, so we could not practise basketball for several years. 3. We played basketball in the playground this afternoon _ it was getting dark. 4. It is the first time we have played basketball _ Monday. We enjoyed ourselves very much. 5. I waited for 20 minutes at the bus stop _ the bus arrived. 6. It is Friday evening. I will not go to bed _I finish watching my favourite TV programme. since until until till/until till/until since Practice2 B.Finish the exercises on Page 55. when 当……时,表示主句动作发生的特定时间。 The days get longer when spring comes. 春天来时,白天变长了。 while当……时,引导的从句用进行时态,从句谓语动词必须是延续性的动词。 While the boys were playing football, it rained. 当男孩子们踢足球时,下雨了。 【注意】while 后面还可以跟表示状态的词。 While I was in Beijing, I visited a lot of places. 我在北京的时候,我参观了很多地方。 Presentation1 【拓展】在含有when和while引导的主从复合句中,当主句和从句的主语一致,并且从句中有be动词时,可以省略主语和be动词,构成when/ while + -ing结构。 When (she is) in trouble, she always asks for my help. 她遇到困难时总是向我求助。 While (I am) travelling, I like to buy some souvenirs. 旅游时我喜欢买纪念品。 since, till和until引导的时间状语从句 since 自从……以来, 从句谓语动词用一般过去时,而主句的谓语动词用现在完成时。 They have been friends since they were at primary school.他们从小学起就一直是好朋友。 till和until 到……为止 ,一般情况下两者可以互换。until可以放在句首或句中,而till不可以用在句首。 如果主句中的谓语动词是非延续性动词,必须用否定形式,即构成“not…until”结构,意思是“直到……才(开始)”。 Walk till/until you see a white house.一直走到你看到一座白房子为止。 I did not go to bed until I finished my homework.直到做完作业我才上床睡觉。 Presentation2 探究由before、after、when和while引导的时间状语从句 1.请在下列句子中找出时间状语从句并在其后面的括号中用√进行标注。 (1)I find that he is very happy every day. ( ) (2)Please let me know when you have trouble. ( √ ) (3)I didn’t know where I could wait for her. ( ) √ (4)Mother always prepares food before I get home. ( √ ) (5)After we finish the work, we go to the cinema. ( √ ) (6)I didn’t know how I could open it. ( ) √ √ 2.通过以上句子,总结如下: 时间状语从句是指在复合句中充当 时间状语 的句子。 时间状语 3.通过例句进行总结: (1) He couldn’t come before the concert began .音乐会开始前他来不了。 (2) Teachers always prepare lessons well before classes begin .老师们总是在上课前把课备好。 He couldn’t come the concert began Teachers always prepare lessons well classes begin 主句 从句 (3) I can go out to play basketball after I finish my homework .我完成作业后可以去打篮球。 before 意为“ 在……之前 ”,表示主句动作发生在从句动作之 前 (前/后)。 after 意为“ 在……之后 ”,表示主句的动作发生在从句的动作之 后 (前/后)。 I can go out to play basketball I finish my homework 在……之前 前 在……之后 后 4.根据下面例句进行总结: When my father came back, the sun came out.当我父亲回来的时候太阳都出来了。 While I was doing my homework, my mother came back.当我正在写作业的时候我妈妈回来了。 When 和 while 都有“ 当……时 ”的意思,这两个词在用法上区别如下: 当……时 e.g. As soon as I arrive in Canada, I will call you. 我一到加拿大,就给你打电话。 Whenever he met us, he smiled at us. 他每次遇见我们,都向我们微笑。 =Every time he met us, he smiled at us. Presentation C as soon as whenever when something happens, or a short time after something has happened every time Exercises C1 Whenever as soon as whenever Simon is writing about David’s love for basketball. Help Simon complete his sentences with as soon as or whenever. 1. David often goes to play basketball _ school is over. 2. He watches the NBA _ there is a game on TV. 3. _ he talks about basketball, he gets excited. 4. _ he learnt that the NBA players would come to China, he tried his best to get a ticket. As soon as Exercises C2 David is writing about Yao Ming, his favourite basketball star. Help him complete his article with the correct conjunctions you have learnt in this unit. (P56) Yao Ming was born in Shanghai in 1980. he got his first basketball (1) _ he was only four years old, but he did not become serious about basketball (2) _ he was 12. Yao joined the Houston Rockets in 2002 and became the best Chinese player to ever play in the NBA. when till/until before, after, when, while, since, till/until, as soon as, whenever Exercises C2 (3) _ he went to the USA, he knew little English, but he quickly learnt the language. The best moment in his career was in 2004—he scored 41 points in a game against the Atlanta Hawks. When Yao Ming was living in the USA, he returned to China (4) _ he was needed. He took part in the Olympics in 2004 and in 2008 as one of the Chinese athletes. (5) _ he ended his basketball career, Yao has done more charity work, especially for poor Chinese teenagers. When/Before whenever Since Homework 1. Remember the usage of conjunctions of time. 2. Finish the exercises. 3. Preview Integrated skills. $