人教版(新教材)高中英语选修2Unit 1　Science and Scientists学案1：Grammar

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As a young doctor, John Snow became frustrated because no one knew how to prevent or treat cholera.One theory was that bad air caused the dis

2、ease.The other was (hat cholera was caused by an infection from germs in food or water.The truth was that the water from the Broad Street pump had been infected by waste.Thats why weve given you the letter.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 中的连接词一在句中只起连接作用，没有含义

3、，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。whether引导的表语从句The question remains whet

4、her they will be able to help us.问题是他们能否帮助我们。R点津1 if不能引导表语从句。连接代词和连接副词引导的表语从句The problem is how we can find him.问题是我们如何找到他。He is no longer what he was.他已经不再是以前的他了。Thats where you are wrong.那就是你不对的地方。because, as if/as though 引导的表语从句It sounds as ifYas though someone is knocking at the door.听起来好像有人在敲门。

5、Thats because you cant appreciate music.那是因为你不能欣赏音乐。三、考前须知. why和because引导的表语从句的区别Thats why.意为“那是的原因”，强调结果Thats because.意为“那是因为”，强调原因I didnt phone her, and thats why she got angiy with me.（强调“她对我生气”这-结果） 我没有给她打 ，那就是她对我生气的原因。I didnt phone her, and thats because I got angry with her.（强调生气”这一原因） 我没有给她打

6、，那是因为我生她的气了。.表语从句中的虚拟语气在表语从句中，当主句中的主语是：advice, suggestion, proposal, request, order, idea等时, 从句谓语形式是“should+动词原形（should可以省略广。My suggestion is that we （should） start early tomorrow.我的建议是我们明天一早就出发。即时演练补全句子The fact was.事实是他没有真正努力工作。The question is.问题是这部电影是否值得看。Now she has known Millie fbr years.现在看起来好像她认识米莉己经许多年了。My advice is that you as often as possible.我的建议是你应该尽可能地经常练习说英语。 Thats.那就是我第一次遇见她的地方。The problem is.问题是谁真正适合做这份艰苦的工作。 参*考*答*案 探究发现(1)形容词；从句(2)2、3、4 that (3)为什么；好像要点突破that he didnt really work hard whether the film is worth seeing it seems a