Unit 4-4 Grammar 课件 2023-2024学年牛津译林版九年级英语上册

Unit 4 Growing up Grammar 译林版九年级上册 英语 1 Lead-in 1. Squirrels save food before winter comes. 2. After the war started, lots of people lost their lives. 3. I was sleeping when it started to rain. 4. While Millie was watching TV, Andy came into the room. 5. My family have lived here since I was born. 6. You can ask for help whenever you need it. 1. Squirrels save food before winter comes. 2. After the war started, lots of people lost their lives. 3. I was sleeping when it started to rain. 4. While Millie was watching TV, Andy came into the room. 5. My family have lived here since I was born. 6. You can ask for help whenever you need it. Adverbial clauses of time(时间状语从句) 时间连词（conjunctions of time） till, until, as soon as… before after when while before after when do homework wash the dishes watch TV have dinner Presentation earlier than a certain time later than a certain time at or during a certain time during a certain time A I had dinner before I did my homework. I watched TV after I did my homework. I was doing my homework when it started to rain. I was doing my homework while my mother was washing the dishes. start to rain past future /while before after when/while do homework wash the dishes watch TV have dinner Presentation A start to rain Tip 1: before/after 还可以用作介词。 e.g. We do morning exercises before 9 a.m. 我们9点前做早操。 They always have a rest after lunch. 他们总是在午饭后休息一下。 past future before after when while before after when/while do homework wash the dishes watch TV have dinner Presentation A start to rain Tip 2: when引导的从句谓语动词可以是短暂性的，也可以是延续性的。while引导的从句谓语动词必须是延续性的。 e.g. The days get longer when spring comes. 春天到来时，白天变长。 While/When he was walking to the bus stop, he lost his wallet. 在他走向公交站时，丢了钱包。 past future before after when while before after when/while do homework wash the dishes watch TV have dinner Presentation A start to rain Tip 3: 在含有when和while的复合句中，若主句和从句的主语一致，且从句中有be动词，可省略主语和be动词，构成when/while doing的结构。 e.g. When