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1、高考英语名词性从句高中英语名词性从句是高考考查的重点，包括主语从句、宾语从句、表语从句及同位语从句。下面来进行一一讲解。名词性从句（1）主语从句1. 定义：用作主语的从句叫做主语从句。2. 构成：关联词+简单句3.引导主语从句的关联词有三类： (1) 从属连词that。 如：That they were in truth sisters was clear from the facial resemblance between them. 很明显，她们确是亲姐妹，她们的脸型很相似。 (2) 从属连词whether。如： Whether hell come here isnt clear. 他是
2、否会来这里还不清楚。 (3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever 连接副词 where, when, how, why。如： What she did is not yet known. 她干了什么尚不清楚。 How this happened is not clear to anyone. 这事怎样发生的，谁也不清楚。 Whoever comes is welcome. 不论谁来都欢迎。 Wherever you are is my home - my only home. 你所在的任何地方就是我的家
3、-我唯一的家。解释： 1. 主语从句能用it作形式上的主语。常以it作形式主语的句型有：A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。如： It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。 It is probable that he told her everything. 很可能他把一切都告诉她了。B. It+be+名
4、词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。如： Its a pity that we cant go. 很遗憾我们不能去。 Its no surprise that our team should have won the game. 我们没赢这场比赛真意外。C. It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句。如： It is said that Mr. Gr
5、een has arrived in Beijing. 据说格林先生已经到了北京。 It is reported that China has sent another man-made earth satellite into orbit. 据报道中国又成功地发射了一颗人造地球卫星。D. It+seem, happen等不及物动词及短语+that从句。如： It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会。 It happened that I was out that day. 碰巧我那天外出了。E.
6、It+doesnt matter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。如： It doesnt matter whether she will come or not. 她是否来这无关紧要。 It makes no difference where we shall have the meeting. 我们在哪里开会毫无区别。F. 当that引导的主语从句出现在疑问句中时，要以it作形式主语，而把主语从句后置。如： Is it true that the scientist will give us a lecture next week?
7、 下周那位科学家将给我们作报告是真的吗? Does it matter much that they will not come tomorrow? 他们明天不来很要紧吗?G. 当主语从句出现在感叹句中时，要以it作形式主语，而把主语从句后置。如： How strange it is that the children are so quiet! 孩子们这么安静真奇怪! 2.注意连接代词whoever, whatever, whichever等引导主语从句的含义 Whoever comes will be welcome. (whoever=the person who) 来的人将受到欢迎。
8、Whatever he did was right. (whatever=the thing that) 他所做的事情是正确的。 Whichever of you comes in will receive a prize. (whichever=anyone of you who) 你们当中不论哪个进来将会得到奖名词性从句（2）宾语从句宾语从句是一种名词性从句，在句中作及物动词的宾语，或介词的宾语，或形容词的宾语。根据引导宾语从句的不同连词，宾语从句可分为三类。1. 由that引导的宾语从句。That只有语法作用，没有实在的意义，在口语和非正式文体中可以省略。例如：He said (that
9、) he wanted to stay at home.他说他想呆在家里。She doesnt know (that) she is seriously ill.她不知道她病得很严重。I am sure (that) he will succeed.我确信他会成功。2. 由连接代词who, whom, whose, what, which和连接副词when, where, why, how引导的宾语从句。这些连接代词和连接副词在宾语从句中充当某个成分。例如：Do you know who (whom) they are waiting for? 你知道他们在等谁吗？He asked whose
10、 handwriting was the best.他问谁的书法最好。Can you tell me where the No.3 bus stop is? 你能告诉我3路公共汽车站在哪儿吗？I dont know why the train is late.我不知道火车为什么晚了。I cant imagine why he did that thing我不能想像他为什么做了那件事。Do you know why we have put off the sports meet till next month? 你知道我们为什么把运动会推迟到下个月吗? 以上两个例句的宾语从句相当于一个特殊疑问句
11、，分别为：why did he do that thing?和Why have you put off the sports meet till next month?由于宾语从句要求陈述句语序，故而在从句中它变成了陈述语序。请看下列两组句子：How much does this coat cost? 这件衣服值多少钱? I want to know how much this coat costs我想知道这件衣服值多少钱。Where did you go yesterday? 你昨天去哪儿了?Please tell me where you went yesterday请告诉我你昨天去哪儿了
12、。 当疑问代词what，who在特殊疑问句中做主语时，该特殊疑问句本身就是陈述句语序，所以当该句用来做宾语时，语序不需要调整。Whats wrong with you? 怎么了?He asked the girl what was wrong with her他问这个女孩怎么回事了。Whats the matter? 怎么了?He asked the girl what was the matter他问这个女孩怎么了。What has happened to him? 他发生什么事了?We want to know what has happened to him我们想知道他发生了什么事。同类
13、句式还有：Who broke the window? 谁打破的窗户?Who is in the classroom? 谁在教室里?What made him so angry什么使得他如此生气。3. 由if或whether引导的宾语从句。表示“是否”，二者通常可以互换。例如： Lily asked if/whether she liked it.莉莉问她是否喜欢它。I want to know if (whether) he lives there.我想知道他是否住在这儿。He asked me whether (if) I could help him.他问我是否可以帮助他。但语义有点区别：
14、1）whether强调犹豫和选择，多见于书面语中；if 只限于条件，常用于口语。例如：Write and tell me whether Im to come. 请写信告诉我，我是否该来。Write and tell me if Im to come. 如果我该来，请写信告诉我（相当于说：若我不必来，那就不用费心写信给我了。）2）whether可引导各种名词性从名和让步状语从句，if 只能引导宾语从句和条件状语从句。由if引导的从句，首先要弄清楚是宾语从句，还是条件状语从句，然后再确定时态。若是引导条件状语从句，谓语动词应用一般现在（过去）时代替一般将来（过去将来）时。例如：If you do
15、nt go soon, youll be late.如果你不马上去就会迟到。当if引导一个非真实条件句时，从句的谓语动词应用过去式（如果是be, 则不论主语的人称和数，一律用were）,主句谓语动词用“would+动词原形”。例如：If everyone in the country knew first aid, many lives would be saved.如果每个国民都懂得急救（的知识），许多生命就会得以挽救。3）whether和if都可以与or not连用。但if与or not之间常需要用词语隔开，而whether与or not可连用，也可隔开。例如：Can you tell m
16、e whether or not the train has left?(=Can you tell me whether the train has left or not?)你能告诉我火车是否离开了吗?I dont care if your car breaks down or not .我不在乎你的汽车是否坏了。4）下列情况，只用whether作引导词：引导主语从句、同位语从句、表语从句、让步状语从句。例如：Whether he comes or not doesnt concern me.他来不来与我无关。I am in doubt whether I ought to give this
