高三英语复习名词性从句
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名词性从句的用法〔Noun Clauses〕Step1: 名词性从句的种类为4种:〔1〕主语从句.〔2〕宾语从句.〔3〕表语从句.〔4〕同位语从句.一. 主语从句的用法特点:相当于名词的功能,在复合句中作主句的主语.(一)由“that〞引导的主语从句.特点:〔1〕“that〞没有实在意义.〔2〕不行省略.〔3〕后接完整的句子,共同作主语,谓语动词用单数. 〔4〕也可用“it〞作形式主语,而把主语从句放在句末.E g:That the earth goes round the sun is known to all of us.主语系动词表语译文:地球围着太阳转是众所周知的.E g:It’s great that you got a scholarship真正主语译文:你拿了奖学金真是太好了.(二)由“whether〞引导的主语从句.特点:〔1〕“whether〞有意义, 表示“是否〞.〔2〕不行省略.〔3〕后接完整的句子,共同作主语,谓语动词用单数. 〔4〕往往和“or not〞连接. 〔5〕也可用“it〞作形式主语,而把主语从句放在句末.E g:Whether he will e or not is unknown主语译文:他来不来还不知道.E g:Whether he can help me or not doesn’t matter too much.主语=It doesn’t matter too much w hether he can help me or not译文:他是否要关心我关系不大/无关紧要.(三)由“特别疑问词代词和疑问副词〞引导的主语从句.1,疑问代词“what〞引导的主语从句特点:〔1〕“what〞有意义, 表示“什么〞.〔2〕不行省略.〔3〕后接完整的句子,共同作主语,谓语动词用单数. 〔4〕“what〞在从句中作及物动词的宾语,或者在从句中作主语.E g:What I told you is between you and me.主语译文:我告知你的是个隐秘.E g:What’s important is that one strives to achieve a goal.主语译文:重要的是为到达目标而不懈努力.E g:What bothers me is that I have no time.主语译文:让我困扰的是我没有时间.2,疑问代词“whatever〞引导的主语从句特点:〔1〕“whatever〞有意义, 表示“无论什么〞.〔2〕不行省略.〔3〕后接完整的句子,共同作主语,谓语动词用单数. 〔4〕“whatever〞在从句中作及物动词的宾语,或者在从句中作主语.E g:Whatever is worth doing at all is worth doing well.主语译文:任何值得做的事情都值得把它做好.E g:Whatever he said is true.主语译文:他说的任何话都是真的.3,疑问代词“whoever〞引导的主语从句特点:〔1〕“whoever〞有意义, 表示“无论谁/任何人〞.〔2〕不行省略.〔3〕后接完整的句子,共同作主语,谓语动词用单数. 〔4〕“whoever〞在从句中作作主语.E g:Whoever makes such a mistake should be punished.主语译文:凡犯此错的人都应受到惩处.E g:Whoever wants to reach a distant goal must take many small steps.主语译文:不管是谁,要到达远期目标,都必需一步一步往前走.4,疑问代词“where/wherever〞引导的主语从句特点:〔1〕“wherever〞有意义, 表示“无论哪里〞.〔2〕不行省略.〔3〕后接完整的句子,共同作主语,谓语动词用单数. 〔4〕“wherever〞在从句中作作状语.E g: Where we are going to spend the weekend hasn’t been decided yet.主语译文:我们准备去那里过周末还没有打算呢.二.表语从句的用法特点:相当于名词的功能,在复合句中作主句的表语,位于主句的系动词之后.(一)由“that〞引导的表语从句.特点:〔1〕“that〞没有实在意义.〔2〕不行省略.〔3〕后接完整的句子,共同作表语.E g:My biggest problem is that I can’t municate with others freely.主语系动词表语从句译文:我最大的问题就是无法与别人自由沟通.(二)由“whether〞引导的表语从句.特点:〔1〕“whether〞有意义,表示“是否〞.〔2〕不行省略.〔3〕后接完整的句子,共同作表语.E g: What our parents are worried about is whether we will be able to build a better future主语系动词表语从句译文:我们父母所担忧的是我们是否能够创立一个美妙的将来.(三)由“特别疑问词代词和疑问副词〞引导的表语从句.1,疑问代词“what〞引导的主语从句特点:〔1〕“what〞有意义, 表示“什么〞.〔2〕不行省略.〔3〕后接完整的句子,共同作表语,谓语动词用单数. 〔4〕“what〞在从句中作及物动词的宾语,或者在从句中作主语.E g:Luck is what happens when preparation meets opportunity.表语从句译文:幸运就是当一个做好预备的人遇到了时机.E g:Dreams are what you hope for ; reality is what you plan for.表语从句表语从句译文:幻想是的追求,现实是你的方案.2,疑问代词“whatever〞引导的主表从句特点:〔1〕“whatever〞有意义, 表示“无论什么〞.〔2〕不行省略.〔3〕后接完整的句子,共同作表语. 〔4〕“whatever〞在从句中作及物动词的宾语,或者在从句中作主语.E g: The main problem is whatever he has done主语表语从句译文:主要问题是他究竟做了什么事情.3,疑问代词“who/whoever〞引导的表语从句特点:〔1〕“whoever〞有意义, 表示“无论谁/任何人〞.〔2〕不行省略.〔3〕后接完整的句子,共同作表语,谓语动词用单数. 〔4〕“whoever〞在从句中作作主语.E g: The main problem is who can take his place. He really is one of a kind主语表语从句译文:主要问题是谁能取代他的位置. 他真的是独一无二的.4,疑问副词“where/wherever〞引导的表语从句特点:〔1〕“wherever〞有意义, 表示“无论那里〞.〔2〕不行省略.〔3〕后接完整的句子,共同作表语.〔4〕“wherever〞在从句中作状语.E g: The main problem is where we can find a hotel now.主语表语从句译文:主要问题是现在我们到那里去找旅馆.5,疑问副词“how〞引导的表语从句特点:〔1〕“how〞有意义, 表示“无论如何〞.〔2〕不行省略.〔3〕后接完整的句子,共同作表语. 〔4〕“how〞在从句中作方式状语.E g: The main problem is how we can solve such a tough problem.主语表语从句译文:主要问题是我们如何才能解决这个麻烦的问题.三.宾语从句的用法特点:相当于名词的功能,在复合句中作主句的宾语,位于主句的及物动词之后.(一)由“that〞引导的宾语从句.特点:〔1〕“that〞没有实在意义.〔2〕可省略.〔3〕后接完整的句子,共同作宾语.E g: I think(that) this food is out of this world主语及物动词宾语从句译文:我认为这道菜真是一绝.〔二〕“if〞引导宾语从句的特点:〔1〕“if〞有含义,表示“是否〞.〔2〕不行省略.E g: I just wonder / if / she can /e to my birthday party/ tonight.主语状语谓语引导词宾语从句译文:我只是想知道今晚她是否来参与我的生日宴会.留意:“If〞引导的宾语从句的用法与“whether〞引导的宾语从句的用法的两点区分. 〔1〕假设句末没有消失“or not〞, 两者可以互换.〔2〕假设句末消失“or not〞, 只能用“whether〞.E g: I don’t know / if/ whether / my parents can/ e to the class meeting.〔两者皆可〕主句引导词宾语从句比拟:I don’t know whether my parents can e to the class meeting or not.〔只能用“whether〞〕.〔三〕由疑问词引导的宾语从句.1, 由“what〞引导的宾语从句特点:〔1〕“what〞有实在意义,表示“什么〞.〔2〕不行省略.〔3〕后接完整的句子,可以在宾语从句中作主语和宾语.E g: Y ou never know what you can do till you try主语及物动词宾语从句译文:假如不去尝试,你永久也不知道自己能做什么.E g: We never know what will happen to us in the distant future主语及物动词宾语从句译文:我们永久也不知道在遥远的将来究竟发生什么状况.2 ,由“when〞引导的宾语从句特点:〔1〕“when〞有实在意义,表示“何时〞.〔2〕不行省略.〔3〕后接完整的句子,可以在宾语从句中作时间状语.E g: The stranger doesn’t know when the ship arrives主语及物动词宾语从句译文:谋生人不知道轮船何时到达.3 ,由“where〞引导的宾语从句特点:〔1〕“where〞有实在意义,表示“何处〞.〔2〕不行省略.〔3〕后接完整的句子,可以在宾语从句中作地点状语.E g: Could you please tell me where the nearest post office is?宾语从句译文:请你告知告知我最近的邮局在哪里吗?4,由“why〞引导的宾语从句特点:〔1〕“why〞有实在意义,表示“为什么〞.〔2〕不行省略.〔3〕后接完整的句子,可以在宾语从句中作缘由状语.E g: I didn’t understand why my boss was angry with me yesterday宾语从句译文:我不明白老板为什么昨天生我的气.5,由“how〞引导的宾语从句特点:〔1〕“how〞有实在意义,表示“如何〞.〔2〕不行省略.〔3〕后接完整的句子,可以在宾语从句中作方式状语.E g: I don’t know how I can e up with such a good idea宾语从句译文:我不知道如何才能想出一个好的办法.6,由“who〞引导的宾语从句特点:〔1〕“who〞有实在意义,表示“谁〞.〔2〕不行省略.〔3〕后接完整的句子,可以在宾语从句中作主语.E g: Could you tell me who is in charge of sales department?宾语从句译文:我不知道如何才能想出一个好的办法.7,由“whom〞引导的宾语从句特点:〔1〕“whom〞有实在意义,表示“谁〞.〔2〕不行省略.〔3〕后接完整的句子,可以在宾语从句中作宾语.E g: He asked me whom I was waiting for宾语从句译文:他问我在等待谁.8,由“whose〞引导的宾语从句特点:〔1〕“whose〞有实在意义,表示“谁的〞.〔2〕不行省略.〔3〕后接完整的句子,可以在宾语从句中作定语.E g: I can’t decide whose advice I should take宾语从句译文:我打算不了我应当实行谁的意见.9,由“which〞引导的宾语从句特点:〔1〕“which〞有实在意义,表示“哪一个、哪一些〞.〔2〕不行省略.〔3〕后接完整的句子,可以在宾语从句中作定语.E g: Please tell me which class you are in宾语从句译文:请告知我你在哪个班级.〔四〕.宾语从句语序的用法.特点:假设主句为一般疑问句,宾语从句的肯定要用正常语序,也就是宾语从句的情态动词、系动词、助动词不能放在从句的主语前.E g: Can tell me if/whether I have the flu?宾语从句译文:你能不能告知我我是不是得了流感?E g: Do you know where my mother went?宾语从句译文:你知道我妈妈去了哪里了吗?E g: Do you by any chance know why I was fired?宾语从句译文:你是否刚好知道我为什么被炒鱿鱼?〔五〕.宾语从句否认转移的用法.特点:在感知动词,即:“think/believe/suppose/expect〞等动词引导的宾语从句中,从句谓语动词尽管是否认意思,而把否认词转移到主句的谓语动词前.E g: I don’t believe you can finish the project alone宾语从句译文:我信任你一个人无法完成这个工程.E g: I don’t think you are right宾语从句译文:我想你不对.四.同位语从句的用法定义:用作同位语的从句叫做同位语从句。
高三英语(课标全国卷)名词性从句和定语从句1. 掌握名词性从句连接词的基本用法。
2. 掌握名词性从句时态照应的基本用法。
3. 掌握定语从句关系代词的基本用法。
4. 掌握定语从句关系副词的基本用法。
一、名词性从句名词性从句是一种具有名词功能的非独立分句。
名词性从句包括主语从句、宾语从句、表语从句、同位语从句。
引导名词性从句的引导词有:1)连接代词:what(ever),who(ever),whom(ever),which(ever),whose。
作主语、宾语表语、定语。
2)连接副词:when,where, how, why。
作状语、表语。
3)从属连词:that,whether,if不作成分。
(一)that引导的名词性从句1. 引导主语从句1) It is/was+形容词/名词/过去分词+that从句。
It is certain that our team will win the game.我们队一定会赢得比赛。
It is no wonder that our team won the game.我们队赢了那场比赛并不足为奇2)It+不及物动词+that从句。
It never occurred to me that you could succeed in persuading him to change his mind.我没想到你能成功说服他改变主意。
2. 引导宾语从句1)放在及物动词、形容词或介词之后引导宾语从句。
I truly believe that beauty comes from within.我真的相信美来自内心。
I am afraid that you're mistaken.恐怕你弄错了。
He is a good student except that he is a little bit careless. 他是个好学生,就是有点儿粗心。
2)及物动词+it+宾补+that从句。
高考英语复习备考:名词性从句和定语从句讲练PART 1 考点剖析-名词性从句考点一:考查what引导名词性从句例1.______ annoyed me last night was the noise of the firecrackers from the neighborhood area till midnight.【答案】What【详解】考查名词性从句。
句意:昨晚使我恼火的(事)是从附近街区传来的一直持续到午夜的爆竹声。
句子分析可知,“___ annoyed me last night”为名词性从句作主语,设空处在从句中作主语,表示“……事”,用连接代词what 引导;设空处位于句首,首字母大写。
故填What。
考点二:考查that引导名词性从句例2.When we come across such factual differences, we shouldn’t rush to the conclusion ________ one of the news reports gives false information.【答案】that【详解】考查同位语从句。
句意:当我们遇到这样的事实差异时,我们不应该急于得出其中一篇新闻报道提供了虚假信息的结论。
引导同位语从句,说明conclusion的内容,从句不缺少成分,句意完整,故用that引导。
故填that。
考点三:考查-ever引导名词性从句例3.Every employee needs to find their unique value contribution that makes them stand out in ________ is their field of employment.【答案】whatever【详解】考查名词性从句。
句意:每个员工都需要找到自己独特的价值贡献,使他们在自己的就业领域脱颖而出。
分析句子可知,设空处位于介词in后,在句中引导宾语从句,从句中缺主语,结合句意可知,此处表示物,应用whatever引导。
专题02 名词性从句I.概念名词在句中一般可以作主语、表语、宾语和同位语等。
1. Water freezes below zero. (作主语)2. Eric was a world famous director. (作表语)3. Would you like some bananas? (作宾语)4. Eric, my English teacher, got promoted last year. (作同位语)相当于名词的从句称为名词性从句,分别称之为主语从句、表语从句、宾语从句和同位语从句。
II. 知识重点与难点一、名词性从句的连接词如下:1.从属连词:that无词义,在从句中不充当成分,在动宾从句中可省略。
whether/ if有词义,但在从句中不充当成分, if 主要用于宾语从句中。
2.连接代词who(ever), whom(ever), whose, what(ever), which(ever) 有词义,在从句中充当成分。
3. 连接副词when, where, why, how 有词义,在从句中充当状语。
二、主语从句:在句子中作主语的从句叫主语从句。
1. 由从属连词引导, 连词本身在从句中不做成分。
That Eric is the most handsome teacher in our school is known to all. (从句作主语,且从句不缺成分,无词义缺失,因此用that。
)Whether he will come or not is not known yet. (从句作主语,从句完整,但缺乏表示“是否”的词,因此用whether。
)2. 由连接代词引导,连词在从句中作主语、宾语、表语和定语。
Who will go remains to be discussed. (从句作主语,who 在主语从句中作主语,表示“某人,谁”。
)What we need is more time. (从句作主语,what 在主语从句中作need 的宾语,表示“东西,什么”。
一.概念:名词性从句就相当于一个名词(因为名词可以充当主语,宾语和表语,所以名词性从句包含主语从句,宾语从句和表语从句和同位语从句)二.名词性从句主语从句That she is beautiful is a fact.主语从句系定表宾语从句We know that she is beautiful.主谓宾语从句表语从句 Our opinion is that she is beautiful.主系表语从句同位语从句The opinion that she is beautiful is a fact.主同位语从句系定表三.名词性从句的格式 1. that+陈述句=名词宾1.结构:主语 + 谓语2.语序:陈述句语序3.连接词 :①由that 引导②由if /whether 引导know if / whether Hua likes fish.③由特殊疑问词引导,表示特殊疑问意义 I want to know what time it is now.4.时态①当主句是一般现在时,从句根据情况使用任何时态。
(即:主现从不限)I don’t know (that) she is singing now.②当主句是一般过去时,从句应使用过去某时态(一般过去时,过去进行时,过去将来时,过去完成时)。
He said (that) he was at home. 他说他在家里。
③主句使用一般过去时,但从句表示的是客观真理、自然现象时、从句仍用一般现在时。
The teacher told us light travels faster than sound.一、一般结构:主语+连系动词+表语从句,二、可以接表语从句的词有:①be(being, been, am ,is, are, was, were)(be动词)② feel,look,sound, taste, smell (感官动词)③ stand, lie,remain, keep, stay(保持动词)④bee, get, grow, turn ,go ,prove(变化动词)⑤ seem, appear(表象动词)三、公式:a.由连接词that(无意义), whether(是否)引导的表语从句这时主句的主语常常是抽象名词,如problem, result, chance, suggestion, question, reason 等,表语从句对主句主语进行说明,解释等。
高三英语名词性从句知识点名词性从句是英语中的一种从句类型,它在句子中充当名词的角色。
在高三英语学习中,掌握名词性从句的用法和结构对于提高语言表达能力至关重要。
本文将介绍名词性从句的几种类型及其用法。
一、宾语从句宾语从句作为主句的宾语,通常由连接词that, whether/if, why, when, where, how等引导。
宾语从句常出现在及物动词、介词、及一些名词后面。
例句1:I don't know where he went yesterday.我不知道他昨天去哪里了。
例句2:She asked me if I had finished the report.她问我是否已经完成了报告。
二、主语从句主语从句作为句子的主语,通常由连接词that, whether/if, what, who, which, how等引导。
主语从句常出现在句首,也可出现在句尾。
例句3:What he said made me angry.他说的话让我生气。
例句4:Whether we succeed or not depends on our efforts.我们是否成功取决于我们的努力。
三、表语从句表语从句作为主句的表语,通常由连接词that, whether/if, what, who, which等引导。
表语从句一般出现在系动词后面。
例句5:The question is whether we can finish the task on time.问题是我们是否能按时完成任务。
例句6:What matters most is whether you have put in enough effort.最重要的是你是否付出了足够的努力。
四、宾补从句宾补从句作为及物动词的宾语补足语,通常由连接词that, whether/if, what, who, which等引导。
宾补从句紧跟在及物动词后面。
高三语法讲义名词性从句名词性从句根据从句在复合句中的语法作用,分为主语从句、宾语从句、表语从句和同位语从句。
1) 主语从句、宾语从句和表语从句①that分句充当主语从句、宾语从句和表语从句。
例如:That she won a gold medal in the contest greatly comforted her parents. (主语从句)We all agree that honesty is the most important policy. (宾语从句)One advantage of living in the suburbs is that you can enjoy fresh air. (表语从句)②whether分句充当主语从句、宾语从句和表语从句。
例如:Whether the meeting will take place on schedule is not certain. (主语从句)I don’t care whether they will agree to my proposal. (宾语从句)My concern is whether we can benefit from the new regulations. (表语从句)③wh-分句充当主语从句、宾语从句和表语从句。
例如:What caused the accident is still unknown. (what解释为“什么”) (主语从句)What is one man’s meat may be another’s poison. (what解释为“所……的”) (主语从句)Please explain why this is impossible. (宾语从句)You have to answer for what you have done. (宾语从句)My question is when we can apply this theory to practice. (表语从句)④感叹句充当宾语从句或表语从句。
名词性从句句子分类主语+谓语主语+谓语+宾语简单句主语+系动词+表语主语+谓语+宾语+宾补主语+谓语+直接宾语+间接宾语定语从句复合句名词性从句复杂句状语从句并列句:由并列连词把两个或两个以上的简单句连在一起的句子叫并列句从句的特点1.从句也要符合句子的基本结构2.从句只是做为句子某一成分出现的3.从句的关联词很关键, 通常来讲,它们是从句开始的标志名词性从句1. 定义:名词性从句在功能上相当于名词, 在复合句中能担任主语、宾语、表语、同位语等。
主语His job is important.What he does is important.表语This is his job.This is what he does every day.宾语I don’t like his job.I don’t like what he does every day.同位语I don’t know about the man, Mr. White.I don’t know about the fact that he is a teacher.2. 判断谓语动词宾语从句主语从句系动词表语从句When we shall hold the meeting depends on whether John can return tomorrow. The problem is when John will come back.名词同位语从句We expressed our hope that we could visit the country again.思考:定语从句与名词性从句的区别?练习:判断名词性从句1. I don’t know who broke the window.2. She is no longer what she used to be.3. What they need is a good textbook.4. She will give whoever needs help a warm welcome.5. This is where our problem is.6. It is certain that she will do well in her exam.7. The foreigner expressed his hope that he was going to visit the Great Wall again.8. We consider it necessary that he should improve his pronunciation.3. 引导词从属连词:that (无意义)Whether/if (是否)不做成分连接代词:what, whatever, who, whoever, whom, whose, which作主语、宾语、表语连接副词:when, where, why, how作状语4. 分类讲解主语从句(1)that引导的主语从句起连接作用,无词义,在从句中不作成分,不能省略。
名词性从句名词性从句:在句子中起名词作用的句子叫名词性从句(Noun Clauses)。
名词性从句在复合句中能担任:主语、宾语、表语、同位语等。
名词性从句分为:主语从句、宾语从句、表语从句和同位语从句。
一、引导名词性从句的连接词名词性从句的引导词可分为三类:1、从属连词(5个)(1)that无词义,在从句中不做成分(表明从句的确定性),在宾语从句或表语从句中that有时可以省略(2)whether, if有词义,在从句中不做成分(whether, if均表示“是否”之意,表明从句内容的不确定性) 不可以省略(3)as if, as though (均表示“好像”,“似乎”之意)在从句中不做成分2、连接代词(9 个):what, whatever, who, whoever, whom, whomever, whose, which, whichever,有词义,在从句中做成分,不可以省略(who what which在从句中做主语、宾语、其中what指代没有范围的事物, which指代有范围的事物,表“选择哪一个"whom做宾语whose做定语)3、连接副词(7 个):when, where, how, why, whenever, wherever, however 有词义,在从句中做状语,不用以省略二、主语从句主语从句:作主语的从句叫主语从句。
考点一、主语从句引导词that:无词义,在主语从句中不做成分,不可省略That he dislikes the movie is none of my business.1.whether:翻译为“是否”,在从句中不做成分,不可省略1)Whether he will come is unknown.2)Whether spending money to enhance employees,working skills is the most crucial investment that has been debatedheavily among managers.3)由连接代词what, who, whom, which, whoever, whatever, whichever, whose 等引导的主语从句,连接代词需要在从句中做主语或者宾语,不可省略。
语法复习专题(11)Unit11 名词性从句一、考点聚焦1、名词性从句中连接词的运用名词性从句中的连接词有连词that / whether / as if,连接代词what / who/ which / whose / whatever / whoever / whomever / whichever,连接副词where / when / why / how / wherever / whenever。
(1)that的用法。
①主语从句、表语从句、同位语从句中用that但不能省略。
如:That they are good at English is known to us all.The problem is that we don’t have enough money.She expressed the hope that they would come to China one day.②宾语从句中的连接词that有时可省有时又不可省,在以下几种情况中that不能省略:(A)当that从句和主句谓语动词之间有插入词语或者从句主语之间有插入语时,that不可省略;(B)当that 从句与另一名词性从句并列作宾语时,that不能省;(C)当that作介词宾语时,that不可省掉。
如:He judged that,because he was a child, he did not understandwineEveryone knew what happened and that she was worried.The reason lies in that she works harder than the others do.③that从句作主语和宾语时,可以用it 来替换成以下几种结构表达。
(A)It is clear/certain/likely/true/surprising that… (B)It is a pity/shame/good idea/no wonder that ...(C)It is said/reported/ believed/known/thought/suggested that … (D)It seems/happens that。
如:It happened that I went out last night.It is said that China will win in the World Cup.④that和what的区别。
that 引导名词性从句时,在主从句中不以当任何句子成分,也没有任何含义;而what 引导名词性从句时,在主从句中都要充当一定的句子成分,what可以分解成定语从句中的先行词 + 关系代词即常说的先行词 + that。
如:It’s shame that he has made such a mistake. Do what he says.⑤同位语从句与定语从句中that的区别。
同位语从句中的连词that只起连接作用,在从句中不担当任何句子成分;而定语从句中的关系代词that在句中做宾语或主语,宾语与先行词有修饰关系。
如果句子是同位语从句,就应用连词that而不能用which.同位语从句一般放在表具体含义的名词后解释名词的含义或内容,如以下名词:news、fact、suggestion、truth、plan、belief、doubt、possibility、idea等,而定语从句只是对先行词的限定和修饰。
如:They expressed the hope that they would come to visit China again.(同位语从句)The hope she expressed is that they would come to visit China again.(定语从句)(2)whether和if的用法。
①whether和if在宾语从句中可以互换,但是作介词宾语时连接词一般用whether。
如:It all depends on whether they will come back.②后面直接跟or not 时用whether。
如:I did n’t know whether or not he had arrived in Wuhan.③主语从句表语从句中只能用whether。
如:Whether the meeting will be put off has not been decided yet.The question is whether they have so much money.④whether可以引导同位语从句,用以说明前面的名词的内容,if不能。
如:We ought to discuss carefully the question whether we can doit or not.⑤whether常与or连用表示一种选择,if不能这样用;whether也可与动词不定式连用但if不能。
如:The question of whether they are male or female is not impor-tant.I have not decided whether to go or not.⑥间接引语位于句首时或者是间接引语提前时用whether不用if。
如:Thank you, but w hether I’ll be free I’m not sure at the moment.⑦whether可引导一个让步状语从句表示“不管”、“无论”,而if不能。
如:Whether he comes or not, we will begin our party on time.(3)疑问词 + ever和no matter + 疑问词的区别。
①疑问词 + ever可引导名词性从句,在主从句中要充当一定的部分。
如:Whoever breaks the rule must be punished.You can choose whatever you like in the shop.②疑问词 + ever还可引导让步状语从句。
如:Whoever breaks the rule, he must be punished,Whatever you do, you must do it well.③no matter + 疑问词只能引导让步状语从句。
如:No matter what you do, you must do it well.No matter who breaks the rule, he must be punished.(4)when和where引导的同位语从句与定语从句的区别。
when 和where前面的名词若是表示时间、地点的名词,则when和where引导的是定语从句,否则则为同位语从句。
如:They put forward the question where they could get the money.This is the place where the accident happened.2、名词性从句中主句和从句的时态一致(1)宾语从句中主句和从句的时态保持一致,但如果从句中表示提示的是客观现象,虽然主句是过去时态,从句仍用一般现在时。
如:Hello,I didn’t know you were in London. How long have you been here?The teacher told us that light travels at a very high speed.(2)主语从句作主语相当于单数第三人称作主语,谓语动词用单数,如果由and 连接两个或两个以上的主语从句作主语时,谓语动词用复数;由两个或多个连接词引导一个主语从句,谓语动词用单数。
如:When the meeting will begin has not been decided yet.When they will start and where they go have not been decided yet.When and where the meeting will begin has not been decided.3、名词性从句的词序名词性从句在句中要用陈述句语序。
如:He asked me what was the matter with me.We’ve heard the news that we’ll move into the new house.Whatever you say will interest us all.二、精典名题导解选择填空1. A computer can only do ________ you have instructed it to do.(NMET 2001)A.howB.afterC.whatD.when解析:答案为C。
本题考查的是名词性从句作宾语的用法。
此句的引导词既作连词又在宾语从句中充当一成分,故what最合适。
2. —I drove to Zhuhai for the air show last week..—Is that _________ you had a few days off ? (NMET 99)A.whyB.whenC.whatD.where解析:答案为A。
此题考查的是从句的用法。
根据题意“我上周开车去珠海看航空展去了。
”下面一句接着问:“那就是你为什么离开的原因吗?”故用why引导表语从句表示原因。
3. I hate __________ when peope talk with their mouths full.(NMET 98)A.itB.thatC.theseD.them解析:答案为A。
本题考查的是形式宾语的用法。
题意为“我讨厌人们谈话时嘴里塞满东西”。
该空白处没有任何含义,而且已经用了when连接该宾语从句,所以此处只填一个形式宾语it。
4.I think Father would like to know I’ve been up to so far, so I decide to send him aquick note.A. whichB. whyC. whatD. how解析:答案为C。
考查宾语从句连词用法,由结构sb. be up to sth.可知,应选what作介词to的宾语。
5.We cannot figure out quite a number of insects, birds, and animals are dying out.A. thatB. asC. whyD. when解析:答案为C。