Unit 3The world meets China Section Ⅱ Using language—Grammar & Integrated skills课件(共74张PPT+ 学案）

英语 选择性必修 第四册[WY] Section Ⅱ　Using language—Grammar & Integrated skills Grammar 状语从句(复习) ①We'll start our project if the president agrees. ②I'll give you an answer immediately I've finished reading the report. ③The head of the company promised to deal with matters of this sort the moment he returned to his office. ④Poor as he was, he was honest. (1)①～④句中黑体部分作_____。 (2)①句中的_____状语从句用_____代替一般将来时。 (3)②句用_____引导时间状语从句；③句用_____引导时间状语从句。 (4)④句中的_____状语从句使用了_____语序。 答案：(1)状语　(2)条件　一般现在时　(3)副词　名词性短语　(4)让步　倒装 状语从句在句中作状语，与副词的作用相同，修饰主句中的动词、形容词或副词等；状语从句放在主句之前时，常用逗号与主句隔开；按其意义和作用一般可分为时间状语从句、地点状语从句、原因状语从句、条件状语从句、让步状语从句、目的状语从句、结果状语从句、方式状语从句和比较状语从句。 (一)时间状语从句 1．when, while, as的用法 用法 例句 when 从句动作与主句动作同时或早于主句动作发生；可以和延续性动词连用，也可以和非延续性动词连用 It was the middle of the night when my father woke me up and told me to watch the football game. 当我的父亲把我叫醒并告诉我看足球赛的时候，那时是半夜。 while 主句动作发生在while从句所指的整个时间内，只能和延续性动词连用，可以用when代替，但when的其他用法，while则无法代替 They rushed in while we were discussing problems. 当我们正在讨论问题时，他们冲了进来。 as 主从句动作同时发生 He sat watching her as she got ready. 他一直坐着看她准备好。 2.表示“一……就……”的常用表达 有immediately, directly, instantly, as soon as, the moment, the minute, the instant, no sooner ... than ... , hardly/scarcely ... when ... 和once。 My mom didn't wait a moment, but came immediately she received my call. 我妈妈未等片刻，而是一接到我的电话就立刻来了。 He had hardly got home when he began to prepare supper. 他一到家就开始准备晚饭。 3．before与since的用法 (1)before意为“在……之前”，从句谓语动词发生的动作晚于主句中谓语动词表示的动作。常用句型： It will be＋一段时间＋before ... “要过……才……” It won't be long before ... “不久……就……” It was＋一段时间＋before ... “过了……才……” It will be one year before I graduate from the high－school. 一年后我才高中毕业。 It was several years before I realized that David had lied to me. 几年之后我才意识到大卫对我撒谎了。 (2)since意为“自从……”，从句常用一般过去时，主句常用现在完成时或现在完成进行时。亦可用于以下常用句型： It has been ＋一段时间＋since ... “自从……已经……” As is reported, it has been more than 100 years since Tsinghua University was founded. 据报道，自从清华大学成立已经有100多年了。 4．till/until和not ... until的用法 (1)till/until表示“某动作一直延续到某时间点才停止”，此时主句谓语动词是延续性动词，主、从句都为肯定式，两者可以换用，但till不可置于句首。 Have you heard the meeting will be put off till/until next Tuesday 这个会议将被推迟到下周二，你有没有听说？ (2)not ... until表示“某动作直到某时间才开始”，主句谓语动词是非延续性动词，从句为肯定式。 I won't tell the student the answe ... ...