外研版高中英语教学课件Book2 Module3Period4 grammar

1、时间状语从句时间状语从句 常由常由从属连词从属连词when, while, as, since, till, before, after, by the time 等引导。等引导。Grammar 1 Adverbial clause of time 时间状语从句时间状语从句when 意为意为这时这时(at this time)或或那那时时(at that time) 时，常用于下列句型：时，常用于下列句型：Sb was doing when 某人正在做某人正在做 突然突然 Sb was about to do when 某人正要做某人正要做 突然突然 Sb had just done sth

2、when 某人刚刚干了某人刚刚干了这时这时 while引导的从句表示引导的从句表示“在在过程过程中中”，强调某一段时间内主句和从句的，强调某一段时间内主句和从句的动作在动作在同一时期发生同一时期发生。因此。因此常用延续性常用延续性动词动词。可替换为。可替换为when。as引导的从句表示引导的从句表示“当当时；一时；一边边一边一边”，主句和从句的动作，主句和从句的动作同时发生，强调伴随同时发生，强调伴随。有时可译为。有时可译为“随着随着”。1. I was reading my teacher came in.2. they were doing homework, someone broke

3、into the house.3. I was about to talk in the classroom the teacher came in.4. they were walking, the girls were singing. 5. he was still young, he was a big star.6. I had just made the mistake mom came in . 7. he grew older, he found it difficult to compose good musicwhenWhile/whenwhenAsWhile/whenwh

4、enAs2) 时间状语从句可以转换成分词短语。时间状语从句可以转换成分词短语。如如: Boys need to develop their bodies fully before they attempt such difficult exercise. Boys need to develop their bodies fully before attempting such difficult exercise.After he worked there for 30years, Haydn moved to London. .Note: 时间状语从句转换成分词短语时时间状语从句转换成分词短语时, , 时时间状语从句的主语和主句主语必须间状语从句的主语和主句主语必须一致才可以。一致才可以。 Having worked there for 30 years, Haydn moved to London. Grammar 2 Part 1Grammar 2 Part 2ons in Part 2 in four. Then report your answers to all.Grammar 2 Part 3Grammar 2 Part 4n check the answer with your partner. Answers to Part 4: Ass