Module 2 Unit 3（同步课件）英语外研版九年级上册

仓颉之初作书盖依类象形故谓之文其形声相益即谓之字文者物象之本字者言孳乳而浸多也著于竹帛谓之仓颉之初作书盖依类象形故谓之文其形声相益即谓之字文者物象之本字者言孳乳而 Unit 3 Language in use Module 2 Lead in While we're staying with our friends，we're going to spend one day in Qingdao. Before we begin dinner，my father gives thanks for the food. When it is all over，everyone helps wash the dishes. And my family always go somewhere interesting as soon as the holiday begins. We have celebrated the festival since the first pioneers from England arrived in America. After they landed，their first winter was worse than any English winter. 时间状语从句：用从句来表达一件事情或一个行为发生的时间。 由after, as soon as, before, since, until, when, while引导时间状语从句。 Read the sentences and talk about what you can find. 在英语中用从句来表示一件事情或行为发生的时间，那么这个从句叫作时间状语从句。时间状语从句在句子中所作的成分是时间状语。 时间状语从句常用when, while, before, after, as soon as, since, until等连词引导 Grammar 时间状语从句 1. when的用法 引导时间状语从句:“当......的时侯”，既可以表示在某一时间点发生的事，又可以表示在某一时间段发生的事。主句与从句描述的动作或事情可以同时发生。 I loved math when I was at school. 我在学校时喜欢数学。 He looked aside when I spoke to him. 我对他说话的时候，他向旁边看。 时间状语从句 2. while 的用法 (1). 引导时间状语从句，意为“当……时候”“在……期间”。 His parents died while he was at school. 在他上学期间他父母去世了。 (2). 引导时间状语从句，意为“与……同时”。 You may go swimming while I’m having lunch. 我吃午饭的时间里你可以去游泳。 时间状语从句 when与while的区别 (1). when引导时间状语从句作“当……时候”讲时，既可与延续性动词也可与瞬间动词连用。 (2). while引导时间状语从句作“当……时候”讲时，只能与延续性动词连用。 When he came in, I was having lunch. 他来时我正在吃午饭。 While he was reading, he fell asleep. 他在读书的时候睡着了。 时间状语从句 3. before 的用法 (1). before 用作连词，其基本词义是“ 在…之前”，用来表示时间或顺序。 如： Turn the light off before you sleep. 睡前先把灯熄掉。 Think before you speak. 说话之前应先想清楚。 时间状语从句 4. after的用法 ，在…之后 (1). prep. After testing, some students look very happy. 考试结束后，一些学生看起来很高兴。 (2). adv. It happened twenty years after. 这事发生在20年之后。 (3). conj. we all missed you after you left.你走了以后， 我们都很想你 时间状语从句 5. as soon as 的用法：“一......就......” as soon as连接的时间状语从句中，指未发生的动作，规律是：主将从现 I will tell him the news as soon as he comes back。 他一回来我就把