(
课件网) 英I语I语I法I专I题I课 状语从句 状语从句 定义：在复合句中作状语，修饰主句中的动词、形容词或副词。 结构：从属连词 + 完整句子（从句） + 主句 作用：说明时间、地点、原因、条件等。 1.时间状语从句 类别 作用 注意点 例句 when (at or during the time that)既可以表示在某一点的时候，又可表示在某一段时间内，主句与从句的动作或事情可以同时发生，也可以先后发生。 最常用的，即可引导短暂性动词，也可引导持续性动作。从句动作发生于主句动作之前只能用 when He became sad and angry when he saw pictures of hungry people in Africa. Whenever you find an interesting book in a bookshop,buy it at once. while 表示“当……的时候”或在某一段时间里”。主句中的动作或状态在从句中的动作过程或状态中发生。在 when 表示 a period of time 时，两者可以互换。while 强调动作本身。 从句中的动词一 般要用延续性动词。 While others are reading books silently, please don't speak loudly. as 表示“当.时候”，往往和 when/while 通用，但它着重强调主句与从句的动作或事情同时或几乎同时发生。可译为“一边……-边”或“随着……"。 主句和从句的时态通常一致。 All the jury's eyes were on himas he continued. Before句型 It+ will/would/may be + 时间段 + before...“要过多久才…”It will/would not be +时间段+ before... “不久就…” It will not be long before we know the result of the experiment. It was +时间段+ before ... “过了(多长时闻)才.It was not +时间段+ before .. “不久就..”“没过(多长时间)就.….” It was some time before we realized the truth. 含义 注意点 例句 before 在…之前 ①有“才……"还没来得及”的含义 before 引导的从句不用否定式的谓语 ②before 引导的从句不用否定式的谓语。 He had lived in Japan for fifty years before he moved here. after 在…之后 before和 after还可以作为介词用后接名词或动名词。 After he had lived in Japan for fifty years, he moved here. Since句型 “lt is+一段时间+since从句”表示“自从...时候已经多久了”since引导的从句的谓语动词若是延续性动词，常理解为某一状态的终止;若是终止性动词，则理解为某一动作的开始。如: ①It is three years since the war broke out(终止性动词)自战争爆发以来已有三年了。 ②It is three years since lsmoked a cigar.(=since l stopped smoking a cigar.)(延续性动词)我不吸烟已有三年了。 [ Until/Till 】 Until 和 till 都表示“直到”,它们唯一的区别是 till 不能置于句首。 肯定句:主句的谓语动词必须是延续性动词的肯定式，意为“某动作一直延续到某时间点才停止”。如: He remained there until/till she arrived. You may stay here until/till the rain stops. 否定句:主句的谓语动词必须是非延续性动词，意为“某动作直到某时间才开始"。如:He won't go to bed till/until she returns. not......until 句型中的强调和倒装用法。如:直到你告诉我，我才知道这件事。 1. 普通版: i had no idea of it until you told me./l didn't have any idea of it until youtold me. 2. 强调句型: it was not until you told me that i had any idea of it. 3. 倒装句型: Not until you told me did l have any idea of it.(not until置于句首，主句要倒装) tips:在使用 not..until句型的时候，倒装和强调不能同时使用。 一…就 (1)as soon as, immediately,directly,instantly,the moment, the minute 和 ... ...
