Unit 5Discovering Useful Structures 语法精讲ppt课件-（2019版）新人教版必修第一册高中英语（新教材）.pptx

1、 教材原句：教材原句： As China plays a greater role in global affairs, an increasing number of international students are beginning to appreciate China s culture and history through this amazing language. 句型分析：句型分析：本句为复合句。句中含有as引导的原因状语从句。 翻译翻译：随着中国在全球事务中扮演着更为重要的角色，越来越多的 国际学生开始通过这门令人惊叹的语言了解和欣赏中国文化和历史。 由于 as引导原

2、因状语从句 概述：概述：as引导原因状语从句，表示“因为，由于”，相当于 since，常用来表示已为人们所知或显而易见的原因或理由。 E.g. As it has rained, the air is cooler. 因为下过雨，所以空气比较凉爽。 同义辨析同义辨析 常用在书面语中，表示多为对方已知已知的或稍加分析便可得知稍加分析便可得知的原因。since because 语气最强，表示一种直接的原因一种直接的原因，常用于回答疑问词why引导的 疑问句。 E.g. Since you are so sure of it, he ll believe you. E.g. He will succ

3、eed because he is careful. 归纳拓展：as引导其它从句 典例分析典例分析 As children get older, they become more and more interested in the things around them. 随着年龄的增长，孩子们对周围的事物越来越感兴趣。 (1) 引导时间状语从句，意为“当时；随着”。 典例分析典例分析 You must do everything as I do. 你必须要照我做事的样子去做所有事。 (2)引导方式状语从句，意为“照方式”。 典例分析典例分析 I dont speak English so/a

4、s well as he( speaks English). 我讲英语没有他讲得那么好。 (3)引导比较状语从句。多用于在asas或 not so/as.as.中， 前一个as是副词，后一个as是连词。 典例分析典例分析 1. Child as he was, he knew what was the right thing to do. 2. Try as he might, he failed in the exam. (4)引导让步状语从句。as引导的让步状语从句必须用倒装的形式， 倒装时将表语、状语或谓语动词提前。 典例分析典例分析 As we expected, he succeed

5、ed in passing the exam. 正如我们所预料的那样，他成功通过了考试。 (5) as用作关系代词引导定语从句，意为“正如，如同”。 1. 由于支持的很少，罢工未获成功。 _, the strike was not successful . 2. 众所周知，中国发生了巨大的变化。 _，great changes have taken place in China. 3. 尽管他学习很努力，但几乎没取得什么进步。 _ ， he makes little progress. . 用用“as引导的从句引导的从句” 完成句子。完成句子。 考点追击考点追击 As there was ve

6、ry little support As is well known Hard as he works Sum up： as引导原因状语从句 1 2 基本用法 拓展 教材原句：教材原句： Add a preposition where necessary. 句型分析：句型分析：本句为复合句。主句为祈使句，从句为状语从句 的省略形式。 翻译翻译：在需要的地方加一个介词。 概述：概述：状语从句主谓成分的省略是英语语言在使用过程 中出现的一种较普遍的现象，它能使语言言简意赅。 典例分析典例分析 1. Although working very hard, he failed in the final

7、 exam. (Although he worked very hard,) 2. After taking the medicine, she felt much better. (After she took the medicine,) (1)当从句的主语与主句的主语一致时，从句可以省略主语，从句 的谓语动词采用其v-ing结构。 典例分析典例分析 1、连词+形容词/名词/介词短语 Whenever (she is) free, she often goes shopping. While (he was) a young boy, he was always ready to help

8、 others. She looked anxious as though (she was) in trouble. (2)当从句的主语和主句的主语一致时，若从句的谓语动词是系动词， 此时从句的主语和be动词通常可以一同省略。 典例分析典例分析 2、连词+现在分词/过去分词/不定式 While (she was) walking along the river bank, she was singing a pop song. If (it is) well read, the book will give you much to think. He stood up as if (he w

9、ere) to say something. (2)当从句的主语和主句的主语一致时，若从句的谓语动词是系动词， 此时从句的主语和be动词通常可以一同省略。 典例分析典例分析 (3)当从句的主语是it, 且谓语动词是be或包含be的某种形式时, it和be常可同时省略。 If (it is) possible, he will help you out of the difficulty. 如果可能的话,他会帮你摆脱困境。 1. He wont go there with us unless _ (invite). 2. Although _ (fright), he managed to ran away. 3. Granny told the children not to talk while _ (eat). 4. He wouldnt solve the problem even if _ (take) charge. 语法填空。语法填空。 考点追击考点追击 invited frightened eating to take Sum up： 状语从句的省略 1 2 3 从句的主语与主句的主语一致 从句的主语和主句的主语一致， 若从句的谓语动词是系动词时 从句的主语是it, 且谓语动词是be Bye-bye!