人教版(新教材)高中英語選修2Unit 1　Science and Scientists學(xué)案1：Grammar

1、Unit 1 Science and ScientistsGrammar(表語從句-句中作表語的從句Ihat/whether引導(dǎo)的表語從句連接詞連接代詞和連接副詞引導(dǎo)的表語從句的用法 because,asif/asthough引導(dǎo)的我語從句考前須知why,because引導(dǎo)的表語從句的區(qū)別表語從句中的虛擬語氣探究發(fā)現(xiàn)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中系動詞became后接 作表語；句2、3、4、5、6中作表語的是_。句 中的連接詞一在句中只起連接作用，沒有含義

3、，且不可省略。句5和句6中引導(dǎo)表語從句的連詞有一定的含義，分別意為“”和要點(diǎn)突破一、概念在主從復(fù)合句中充當(dāng)表語的從句，叫作表語從句。它常位于系動詞之后，用來說明主語 是什么或怎么樣。二、連接詞的用法thal引導(dǎo)表語從句時(shí)的用法：無意義；（2）不充當(dāng)成分；（3）不可省略。The trouble is that she has lost his address.問題是她弄丟了他的地址。My suggestion is that we should tell him the secret.我的建議是我們應(yīng)該告訴他這個(gè)秘密。whether引導(dǎo)的表語從句The question remains whet

4、her they will be able to help us.問題是他們能否幫助我們。R點(diǎn)津1 if不能引導(dǎo)表語從句。連接代詞和連接副詞引導(dǎo)的表語從句The problem is how we can find him.問題是我們?nèi)绾握业剿e is no longer what he was.他已經(jīng)不再是以前的他了。Thats where you are wrong.那就是你不對的地方。because, as if/as though 引導(dǎo)的表語從句It sounds as ifYas though someone is knocking at the door.聽起來好像有人在敲門。

5、Thats because you cant appreciate music.那是因?yàn)槟悴荒苄蕾p音樂。三、考前須知. why和because引導(dǎo)的表語從句的區(qū)別Thats why.意為“那是的原因”，強(qiáng)調(diào)結(jié)果Thats because.意為“那是因?yàn)椤保瑥?qiáng)調(diào)原因I didnt phone her, and thats why she got angiy with me.（強(qiáng)調(diào)“她對我生氣”這-結(jié)果） 我沒有給她打 ，那就是她對我生氣的原因。I didnt phone her, and thats because I got angry with her.（強(qiáng)調(diào)生氣”這一原因） 我沒有給她打

6、，那是因?yàn)槲疑臍饬恕?表語從句中的虛擬語氣在表語從句中，當(dāng)主句中的主語是：advice, suggestion, proposal, request, order, idea等時(shí), 從句謂語形式是“should+動詞原形（should可以省略廣。My suggestion is that we （should） start early tomorrow.我的建議是我們明天一早就出發(fā)。即時(shí)演練補(bǔ)全句子The fact was.事實(shí)是他沒有真正努力工作。The question is.問題是這部電影是否值得看。Now she has known Millie fbr years.現(xiàn)在看起來好像她認(rèn)識米莉己經(jīng)許多年了。My advice is that you as often as possible.我的建議是你應(yīng)該盡可能地經(jīng)常練習(xí)說英語。 Thats.那就是我第一次遇見她的地方。The problem is.問題是誰真正適合做這份艱苦的工作。 參*考*答*案 探究發(fā)現(xiàn)(1)形容詞；從句(2)2、3、4 that (3)為什么；好像要點(diǎn)突破that he didnt really work hard whether the film is worth seeing it seems a