人教版(新教材)高中英语选修2Unit 1 Science and Scientists学案1:Grammar.docx
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1、Unit 1 Science and ScientistsGrammar(表语从句-句中作表语的从句Ihat/whether引导的表语从句连接词连接代词和连接副词引导的表语从句的用法 because,asif/asthough引导的我语从句考前须知why,because引导的表语从句的区别表语从句中的虚拟语气探究发现1. As a young doctor, John Snow became frustrated because no one knew how to prevent or treat cholera.2. One theory was that bad air caused t
2、he disease.3. The other was (hat cholera was caused by an infection from germs in food or water.4. The truth was that the water from the Broad Street pump had been infected by waste.5. Thats why weve given you the letter.6. It looks as if it is going to rain.句1中系动词became后接 作表语;句2、3、4、5、6中作表语的是_。句 中的
3、连接词一在句中只起连接作用,没有含义,且不可省略。句5和句6中引导表语从句的连词有一定的含义,分别意为“”和要点突破一、概念在主从复合句中充当表语的从句,叫作表语从句。它常位于系动词之后,用来说明主语 是什么或怎么样。二、连接词的用法1. thal引导表语从句时的用法:无意义;(2)不充当成分;(3)不可省略。The trouble is that she has lost his address.问题是她弄丢了他的地址。My suggestion is that we should tell him the secret.我的建议是我们应该告诉他这个秘密。2. whether引导的表语从句T
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