【本讲教育信息】 一. 教学内容: Unit 5 of Module Ⅱ Rhythm Period Two Grammar 二. 本课教学目标与要求: 1. 理解和掌握状语从句的功能和结构。 2. 培养学生运用所学知识解决问题的能力。 三. 【状语从句】 (一)概念 状语从句修饰主句中的动词、形容词、副词等,在复合句中作状语。引导状语从句的关联词是从属连词,状语从句用陈述句语序,一般位于复合句的句首或句末。当从句在句首时,从句后常用逗号和主句相隔。状语从句根据其在句中的不同作用分别表示时间、地点、原因、目的、结果、条件、比较、让步、行为方式等。 (二)状语从句类型和从属连接词 状 语 从 句 时间状语从句 when, whenever, as, while, since, after, before, till, until, as soon as,no sooner… than, hardly …when, scarcely… when… 地点状语从句 where, wherever… 原因状语从句 because, since, as, now that… 条件状语从句 if, unless, as long as, on condition that, providing that, provided (that), supposing (that)… 让步状语从句 Though, although, even if, even though, no matter how/what/who, however, whatever, whoever, whichever… 结果状语从句 so that , so… that…, such… that… 目的状语从句 so, so that, in order that…, 方式状语从句 as, as if, as though, the way… 比较状语从句 as…as…, not so (as)…as…, than Adverbial Clause of Time 1. 时间状语从句中的时态。(略) 2. 比较while, when, as 1)as, when 引导短暂性动作的动词。如: Just as / Just when / When I stopped my car, a man came up to me. 我一刹车,有一个人向我走来。 2)当从句的动作发生于主句动作前,只能用when 引导从句,不可用as 或 while。如: When you have finished your work, you may have a rest. 干完活后,你可以休息一下。 3)从句表示“随时间推移”,连词能用as,不用when 或while。如: As the day went on, the weather got worse. 日子一天天过去,天气越变越坏。 4) 仔细区分: I was reading a novel _____ he was watching TV. A. when B. while C. before D. as (while 表示一段时间并表示对比,从句中不能用点动词;when 表示“那时突然”也可以表示从句动作发生在主句动作之前或之后; as 表示“一边……一边……”也可以表示“随时间的推移”。) e.g. When you have finished your work, you may have a rest. I was watching TV, when he suddenly came in. As I was washing the dishes, I was singing songs. You will grow wiser as you grow older. 3. 比较until和till 这两个连词意义相同。肯定形式表示的意思是“做某事直至某时”,动词必须是延续性的。否定形式表达的意思是“直至某时才做某事”。动词为延续性或非延续性都可以。正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。 肯定句:I slept until midnight. 我一直睡到半夜时醒了。 Wait till I call you. 等着我叫你。 (在肯定句中可用before代替。例如 Let’s get in the wheat before the sun sets.) 否定句:She didn’t arrive until 6 o’clock. 她直到6点才到。 Don’t get off the bus until it has stopped. 公共汽车停稳后再下车。 区别: 1)until可用于句首,而till通常不用于句首。如: Until you told me, I had heard nothing of what happened. 直到你告诉我以前,出了什么事我一点也不知道。 2)until when 疑问句中,until要放在句首。如: --Until when are you staying 你呆到什么时候? -- Until next Monday. 呆到下周一。 注意:否定句可用另外两种句式表示 ... ...
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