Unit 4 Growing up 第3课时 Grammar（备课件）-【上好课】2021-2022学年九年级英语上册同步备课系列（牛津译林版）

Unit 4 Growing up Grammar 目 标 掌握连词before, after, when , while, since, till, until, as soon as 和whenever引导的时间状语从句 1 3 通过学习，培养学生在成长过程中无论遇到什么困难都永不言弃的精神。 通过学习，掌握连词以及时间状语从句的用法； 学会用时间状语从句来表达思想，培养写作能力； 2 * 时间状语从句 SummarySummary 时间状语从句是指在复合句中充当时间 状语的句子。 常见引导词：before, after, when, while, since, till/until, as soon as, whenever等。 ① before “在...之前”表示主句动作发生 在从句动作之前。 Mr. Brown had worked in a bank for a year before he came here. 布朗先生来这里之前已经在一家银行里 工作一年了。 Closes the windows before you leave the room, please. 在你离开房间前，请关上窗户。 before、after、when和while 引导的时间状语从句 ② after “在...之后”表示主句动作发生在 从句动作之后。 He left the classroom after he had finished his homework . 他做完作业之后就离开教室。 I went to school after I finished my breakfast. 我吃完早饭后去上学。 ③ when “在...的时候”表示主句动作发 生的特定时间。 Mozart started writing music when he was four years old. (在)莫扎特4岁的时候，开始写音乐作 品。 The days get longer when spring comes. 春天到来时，白天变长了。 ④ while “在...期间; 在…的时候”强调主 句动作和从句动作是同时发生的。 He visited a lot of places while he was traveling. 他在旅行期间参观了许多地方。 While my sister was sweeping the floor, I was washing the dishes. 我姐姐扫地时，我在洗碗。 注意：在when 和while引导的从句中，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 me for my help. 当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。 1. He remained there for about a year _______ the NBA took notice of him. 2. _______ he graduated, he was forced to play in another basketball league. 3. ______ he finally got the chance, he scored 20 points in his first game. 4. _______ (he was) attending junior high, Spud tried out for the school team. 5. Sometimes we forget _______ we should stop. before After When While when Exercises 6. It can cheer you up _______ you are feeling sad. 7. Outside, people were running in all directions _______ pieces of glass and bricks were falli