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名词性从句讲解在复合句中起名词作用的从句叫做名词性从句。
它包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句是中学阶段的一个重要语法项目，在历年的高考中几乎都涉及到，并且每年的命题各有变化。
分析历届高考试题名词性从句考查的焦点主要有以下六个方面1. 考查名词性从句的语序问题2. 考查引导词that与what的区别3. 考查it在名词性从句中作形式主语或形式宾语的用法4. 考查whether与if的区别5. 考查名词性从句中的疑问词+ever引导的名词性从句与no matter+疑问词引导的状语从句的区别6. 考查名词性从句的虚拟语气问题语法要点剖析一、名词性从句主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用，相当于一个名词。
因此，这四种从句通称为名词性从句。
引导名词性从句的连接词可分为三类：连接词：that, whether, if （不充当从句的任何成分）连接代词：what, whatever, who, whoever, whom, whose, which.连接副词：when, where, how, why1. 主语从句作句子主语的从句叫主语从句。
主语从句通常由从属连词that，whether，if和连接代词what，who，which，whatever，whoever以及连接副词how，when，where，why等词引导。
that在句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。
例如：What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。
It is known to us how he became a writer. 我们都知道他是如何成为一名作家的。
Where the English evening will be held has not yet been announced.英语晚会将在哪里举行，还没有宣布。
应用文——书信(宾语从句)1.I'm sorry to know that you’re having such a bad time at the moment.(建议信，慰问信)2. I’m writing to ask if you can come next month.（邀请信）3. I’m writing to tell you that you have passed our test.（通知）4. I’m writing to you to inquire if there would be any position available for me to work as a....（求职信）5. I would appreciate it if you can give me some advice.（建议信）6. So I think that I’m qualified for the position.（求职信）7. I do hope that I can see you soon. (慰问信)8. Everyone in our class misses you so much and we’re all expecting you’ll be back soon.(慰问信)9. I sincerely hope you can understand my situation and accept my apologies.(道歉信)10. I am indeed sorry for what I said, but believe I had no intention to..(道歉信)11. I received such poor service that I felt I should bring to your attention.(投诉信)（主语从句）1.It is important to ... .Then, it also helps that if you. Besides, it would be a good idea to...(建议信)2.What they did has brought joy to others and enriched their own lives.(爱和希望)3.It is recommended that this should be done as quickly as possible.(投诉信)4.It is necessary that effective measures should be taken to end the situation.(建议信)5.Whoever pollutes the environment should be punished.(环保)（表语从句）1.I have some suggestions for you. One is that you should.... another one is that you should...(建议信)2.The trouble is that I have forgotten the password of my photo.(求助信)（同位语从句）1.I have no idea how to deal with this situation.（建议信）2.I have received the news that you will go abroad next year.(建议信)。
高考作文之名词性从句--写作指导名词性从句主要包括主语从句、宾语从句、表语从句和同位语从句，其功能相当于名词(词组)，在句中分别作主语、宾语、表语和同位语。
这四种从句和主句之间不用逗号隔开。
引导名词性从句的连接词主要有以下几种1.连接代词：who(ever), whom (ever)，what (ever), which(ever),whose 等如：I don't know what we should do when facing such problems.2.从属连词：that, whether,if等如：It is natural that customs vary from country to country.Whether the old couple like the holiday remains to be seen.3.连词副词：when，why,where,how 等。
如：①I don't know where I should go.That is where I used to study.why 与because的用法比较：why 与because 均可引导表语从句，但前者强调结果，后者强调原因试比较：①I had a cold.That's why I didn't attend school.我感冒了，那就是我没去上学的原因① 1 didn't attend school.That's because I had a cold.我没去上学，那是因为我感冒了一、用名词性从句完成或翻译下面的句子。
1. ____________________________________(给我印象最深的)is his famous saying "Genius is one percent inspiration and ninety-nine percent perspiration.”.2.Seldom do we know_____________________________________ （正在发生什么)both at home and abroad，let alone what we can do for our country.3.I would like to make friends with _______________________（任何能分享我的快乐的人）.4.我们首先想做的是和那些老人一起包饺子。
名词性从句在句子中起名词作用的从句叫名词性从句。
名词性从句的功能相当于名词词组，它在复合句中能担任主语、宾语、表语、同位语，因此根据它在句中不同的语法功能，名词性从句又可分为主语从句、宾语从句、表语从句、同位语从句。
引导名词性从句的词叫做连接词，包括：1. 连词（在名词性从句中只起连接作用，不作成分）2. 连接代词（在名词性从句中作主语、宾语或表语）3. 连接副词（在名词性从句中作状语）所有的名词性从句的语序都是陈述句语序。
主语从句：是在主句中作主语的从句。
它由连接词引导，通常位于谓语动词之前。
连接词：1. 连词：在从句中不充当任何成分，常见的引导主语从句的连词有that, whether。
That he got the first prize excited him much.他获得一等奖一事使他非常兴奋。
It is doubtful whether we can get there on time.我们能否按时到达那儿还不确定。
1）that引导的主语从句：在从句中不作任何成分，也没有实际意义。
一般情况下that不可省略。
That light travels in straight lines is known to all.众所周知，光沿直线传播。
That you don't like him is none of my business.你不喜欢他不关我的事。
2）whether引导的主语从句：常置于句首，表示“是否”之意；if一般不引导主语从句。
Whether he can finish his task on time is of greatimportance.他是否能按时完成任务非常重要。
Whether you can succeed or not depends on how hard you work at it.你能否成功取决于你努力的程度。
连接代词：在从句中起名词或代词的作用，常作从句的主语、宾语、表语或定语，有具体意义且不能省略。
名词性从句讲解在复合句中起名词作用的从句叫做名词性从句.它包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句是中学阶段的一个重要语法项目,在历年的高考中几乎都涉及到，并且每年的命题各有变化。
分析历届高考试题名词性从句考查的焦点主要有以下六个方面1. 考查名词性从句的语序问题2. 考查引导词that与what的区别3. 考查it在名词性从句中作形式主语或形式宾语的用法 4。
考查whether与if的区别5。
考查名词性从句中的疑问词+ever引导的名词性从句与no matter+疑问词引导的状语从句的区别6。
考查名词性从句的虚拟语气问题语法要点剖析一、名词性从句主语从句、表语从句、宾语从句、同位语从句,在整个句子中所起的作用，相当于一个名词.因此,这四种从句通称为名词性从句.引导名词性从句的连接词可分为三类:连接词：that， whether, if （不充当从句的任何成分)连接代词：what, whatever, who, whoever, whom， whose, which。
连接副词：when, where, how, why1. 主语从句作句子主语的从句叫主语从句.主语从句通常由从属连词that，whether，if和连接代词what，who，which，whatever,whoever以及连接副词how,when，where,why等词引导。
that在句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用,在从句中充当从句的成分。
例如：What he wants to tell us is not clear。
他要跟我们说什么，还不清楚.It is known to us how he became a writer。
我们都知道他是如何成为一名作家的.Where the English evening will be held has not yet been announced.英语晚会将在哪里举行，还没有宣布。
