新教材2021-2022学年人教版英语选择性必修第二册学案：UNIT 1 SCIENCE AND SCIENTISTS SECTION Ⅱ LEARNING ABOUT LANGUAGE WORD版含解析.doc

1、Section Learning About LanguageGrammar 表语从句1As a young doctor, John Snow became frustrated because no one knew how to prevent or treat cholera.2One theory was that bad air caused the disease.3The other was that cholera was caused by an infection from germs in food or water.4The truth was that the wa

2、ter from the Broad Street pump had been infected by waste.5Thats why weve given you the letter.6It looks as if it is going to rain.我的发现(1)句1中系动词became后接形容词作表语；句2、3、4、5、6中作表语的是从句。(2)句2、3、4中的连接词that 在句中只起连接作用，没有含义，且不可省略。(3)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“为什么”和“好像”。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

3、是什么或怎么样。二、连接词的用法1that引导表语从句时的用法：(1)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。2whether引导的表语从句The question remains whether they will be able to help us.问题是他们能否帮助我们。点津if不能引导表语从句。3连接代词和连接副词引导的表语从句The

4、 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。4because, as if/as though引导的表语从句It sounds as if/as though someone is knocking at the door.听起来好像有人在敲门。Thats because you cant appreciate music.那是因为你不能欣赏音乐。三、注意事项1why和because引导的表语从句的区别

5、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 angry with me.(强调“她对我生气”这一结果)我没有给她打电话，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)我没有给她打电话，那是因为我生她的气了。2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,

6、order, idea等时，从句谓语形式是“should动词原形(should可以省略)”。My suggestion is that we (should) start early tomorrow.我的建议是我们明天一早就出发。补全句子The fact was that he didnt really work hard事实是他没有真正努力工作。The question is whether the film is worth seeing问题是这部电影是否值得看。Now it seems as though/as if she has known Millie for years.现在看起来好像她认识米莉已经许多年了。My advice is that you (should) practise speaking English as often as possible.我的建议是你应该尽可能地经常练习说英语。Thats where I first met her那就是我第一次遇见她的地方。The problem is who is really fit for the hard job问题是谁真正适合做这份艰苦的工作。