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名词性从句考点1引导词【考题再现】①(2024·蚌埠模拟) Beijing will carry out measures to help bridge what has become a digital divide for many older people to make sure they share in the benefits of a smart society.①(2024·芜湖模拟) Many of us read poetry simply because we often feel depressed and hopelessly lost, and in poetry we see how beautiful and strange everything is.①(2024·北京丰台模拟) To improve efficiency, a tea-picking robot was made and it is in trial operation now.It can position where the target bud and leaf are and cut them precisely.【要点总结】名词性从句由不同的引导词引导,从句一般保持陈述语序。
引导名词性从句的连接词可分为3类:1.that引导的名词性从句that只起连接主句和从句的作用,在从句中不担任任何成分,本身也没有任何意义。
该从句作主语通常用it 作形式主语,而将从句置于句末。
Scientists have obtained more evidence that plastic is finding its way into the human body.(同位语从句)It is suggested that we should limit the amount of cars to improve our environment. (主语从句)2.wh-词引导的名词性从句wh-词包括who、whom、whose、whoever、what、whatever、which、whichever等连接代词和where、when、why等连接副词。
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。
高考英语一轮复习——名词性从句（附答案）I. 考点分析名词性从句包括：主语从句、宾语从句、表语从句、同位语从句，多由连词that，wh- 疑问词或由what，whatever等关系代词引导，其中同位语从句在高考考试中最常见。
1. 主语从句1) 主语从句在句子中充当主语，句子的谓语动词用第三人称单数。
如：Why he refused to work with you is still mystery.Whoever comes is welcome.2) 主语从句前的that不能省略，仅起连接作用，有时为了保持句子平衡，that从句后置，而由it作形式主语。
如：That he became a lawyer may have been due to his mother’s influence.It is not true that he has moved to New York.2. 宾语从句在句子中充当宾语，如：I don’t know where the sound came from.Don’t be satisfied with what you have achieved.3．当从句放在系动词be, look, remain, seem等后即构成表语从句。
The trouble is that I have lost his address.It seemed that the night would never end.4. 1) 同位语从句是对与之同位的名词中心词作进一步解释，能接名词性从句的常见名词有: idea, fact, news, belief, hope, evidence, opinion, problem, truth, answer, proposal, theory, decision, discovery, problem, thought, understanding 等。
高考英语一轮复习（语法）——名词性从句名词性从句包括：主语从句、表语从句、宾语从句和同位语从句。
引导名词性从句的连词有：A.连词：that, whether, if（这三个词都不作从句的成分，同时，that无含义，而whether和if都表“是否”）B.疑问代词：who, whom, whose, what, whichC.疑问副词：when, where, why, how（一）主语从句在复合句中充当主语的从句。
1.that引导主语从句that引导主语从句时不同于其他的连词，既无词义也不作成分，只起单纯的连接作用，且通常不可以省。
为了强调that引导的主语从句而置之于句首时，that不可省。
①That the driver could not control his car was obvious.②That she was chosen made us very happy.③That he will come is certain.④That he would take the risk is true.⑤That he should have married her isn't surprising.★通常，that引导主语从句时用it做形式主语，把从句置于句尾，此时that 有时可省。
例如：①It was obvious that the driver could not control his car.②It made us very happy that she was chosen.③It is certain that he will come.④It is true that he would take the risk.⑤It isn't surprising (that) he should have married her.★如果以that从句为主语的句子是疑问句，就只能用先行词it结构。
年高考第一轮复习语法专题之名词性从句名词性从句【互动导学】【知识梳理】在复合句中起词名词作用的句子叫名词性从句 (Noun Clauses）。
名词性从句的功能相当于名词，可分别作主句的主语、表语、宾语和同位语。
因此，名词性从句可分为、表语从句、宾语从句和同位从句。
引导名词性从句的连接词1）连接代词： who, whose, whom, what, which有词义，在从句中必须充当句子成分，如主语、表语、宾语或定语等。
2）连接副词： when, where, why, how有词义，在从句中必须充当成分，只能作状语。
3）连接词： that, whether, if, as ifthat 无词义，在从句中不充当成分，做宾语时可省略；if ，whether，as if虽有词义，但在从句中不担任成分。
注意：连接代词与连接副词在句中不再是疑问词，因而从句中谓语不用疑问式。
连接代词与连接副词在从句充当句子成分，连接词whether 和if（是否），as if（好象）在从句中不充当句子成分，只起连接作用。
根据句义，如果连接代词与连接副词，whether、if 和as if都用不上时，才用that作连接词（that本身无任何含义）。
4）连接代词：whatever, whoever, whomever, whichever 5）语序名词性从句都必须与陈述句语序相同，即“主语＋谓语”。
【导学】一：主语从句：在复合句中其语法作用是主语的句中，叫主语从句。
【知识点】1：主语从句位于句首e.g. （1）That he finished writing the composition in such a short time surprised us all.（2）Whether we will go for an outing tomorrow remains unknown.(注意：不能把whether改为if，因为if不能引导主语从句)（3）Whatever you did is right.（4）Who will be our monitor hasn't been decided yet. （5）What caused the accident remains unknown.1（6）Which of the two is better remains to be seen. （7）When we willstart the work is important.【知识点】2：为了避免句子头重脚轻，用it作形式主语，主语从句放在句末。
第七讲名词性从句1．that引导主语从句时，没有具体意思，不充当句子成分，只是起标志性的作用，但that不能省略。
what引导时，在从句中充当成分，且有意义。
◆It is true that the college will take in more new students. 这所大学将招收更多的新生是真的。
2．whether连接主语从句时，表示怀疑，不能省略，意为“是否”，在句首时不能用if替换。
◆(重庆高考)It is still under discussion whether the old bus station should be replaced with a modern hotel or not. 旧汽车站是否应该被重建为现代化的宾馆仍然在商讨中。
3．连接代词、连接副词引导主语从句时不能省略，并在从句中充当句子成分。
◆It was never clear why the man hadn’t reported the accident sooner.这个人为什么没有尽快报告这个事故，还不清楚。
4．主语从句要用陈述语序，即主谓语序。
(1)用it作形式主语的常用句型有：①It＋系动词＋形容词(necessary/right/likely/unlikely/wrong/important/certain等)＋that从句②It＋be＋名词(短语)(a pity/a shame/no wonder等)＋that从句③It＋be＋过去分词(said/told/reported/decided等)＋that从句④It＋特殊动词(seems，appears，happens，matters)＋that从句◆It is a pity that I missed the party held last night.很遗憾我错过了昨晚举行的聚会。
◆It is reported that the accident was caused by carelessness.据报道，该事故源于(司机的)粗心(驾驶)。
(2)在It is necessary/important/suggested/advised/ordered＋that从句结构中，从句用“(should＋)动词原形”。
[典例] (2015·广东高考语法填空)Now it occurred to him ____________ his farm had much potential and that the death of the cow was a bit of luck.that解析：固定句型“it occurred to sb.＋that从句”表示“某人突然想到”，it是形式主语，真正的主语是that引导的从句。
单句语法填空1．(2016·北京高考语法填空)Your support is important to our work.____________ you can do helps.Whatever解析：句意：您的支持对我们的工作很重要。
无论您能做什么都会有所帮助。
____________you can do作句子的主语，是主语从句。
主语从句中缺少动词do的宾语，而且指代做的事情，结合句意可知填Whatever。
2．(2017·山东师大附中一模)His favorite food is fried snacks and soft drinks. It is no surprise____________losing weight is just his dream.that解析：句意：他最喜欢的食物是油炸类小吃和软饮料。
减肥只是他的梦想一点都不令人吃惊。
It是形式主语，真正的主语是that引导的主语从句。
从句中结构及句意完整，故用that引导。
3．(陕西高考)It remains to be seen____________the newly formed committee’s policy can be put into practice.whether解析：句意：新组建的委员会制定的政策是否能实施还有待观察。
It是形式主语，设空处引导主语从句，用whether符合句意。
1．that连接宾语从句时通常可以省略(但多个并列的宾语从句中只能省略第一个that)，没有具体的意思，不充当句子成分，只是起连接作用。
what引导时，在从句中充当成分，且有意义。
◆(全国卷Ⅰ)I’m writing to tell you that my uncle Li Ming is going to your city for a conference.我写信是想告诉你我叔叔李明要去你的城市开会。
2．在whether/if连接的宾语从句中，whether/if意为“是否”，但在whether…or not 结构中，或者whether引导的宾语从句作介词的宾语时，以及whether＋to do结构中和whether引导的从句作少数动词(如leave，put，discuss，doubt，know等)的宾语时，只能用whether，不能用if来替换。
◆We’ve offered her the job，but I don’t know whether she’ll accept it. 我们已经为她提供了这份工作，但我不知道她是否会接受。
◆I don’t know whether to leave or not.我不知道是否要离开。
3．连接代词、连接副词引导宾语从句时不能省略，并在从句中充当句子成分。
◆Our teachers always tell us to believe in what we do and who we are if we want to succeed.老师总是告诉我们，如果想要成功，就要相信我们所做的事情以及我们是谁。
4．有些动词或动词短语，如like，hate，appreciate，depend on，see to等，一般不直接跟从句，需要借助it。
◆You may depend on it that she will go with you.你可以相信她会与你一起去。
5．当主句的主语是第一人称时，在think，believe，suppose，expect等动词后的宾语从句若是否定的，就运用否定转移，将否定词转移到主句谓语动词上。
◆I don’t believe she will attend the meeting.我认为她不会来参加该会议。
6．it作形式宾语，真正的宾语后置，常用此种结构的及物动词有find，make，think，feel，consider等。
◆I find it important that we should keep calm in danger.我发现我们在危险中保持镇静是很重要的。
7．不论主句为何种句型，宾语从句都用陈述语序。
[典例] (2016·全国卷甲短文改错)My classmates and I are talking about how to do during the holiday.how→what解析：句意：我和我的同学正在谈论假期做什么。
根据句意可知，about 后的宾语从句表达的意思为“做什么”，而不是“怎么做”，故用what。
单句语法填空1．(2017·贵州贵阳联考)To our astonishment, we saw a light and some people in a cabin. Jim was too frightened to go on but I felt curious, wondering ____________was happening.what解析：句意：令我们惊讶的是，我们看到在小屋内有一束光和一些人。
吉姆太害怕了，不敢继续往前，但是我觉得很好奇，想知道发生了什么事。
设空处引导宾语从句，并在从句中作主语，表示事物，故用what引导。
2．(2017·石家庄一模)Finally, keep in mind____________there are many things that can’t be learnt immediately, and never be frustrated when you fail in one or two exams.that解析：考查宾语从句。
动词短语keep in mind后是一个宾语从句，且从句中不缺少成分，因此用that引导。
3．(2017·福建安溪模拟)Success partially depends on ____________you have the patience to do simple things perfectly.whether解析：句意：成功部分取决于你是否有耐心把简单的事情做得完美。
设空处引导宾语从句，作介词on的宾语，意为“是否”，故填whether。
1．that连接表语从句时从句为一个句意完整的陈述句，that不能省略，没有具体的意思，不充当句子成分，只是起连接作用。
◆(全国卷Ⅰ)The end result is that we feel like we can’t focus or that we’re focused on the wrong things.最后的结果是我们感觉我们没能集中注意力或我们关注的是错误的事情。
2．whether连接表语从句时从句来源于一般疑问句，为一个句意完整、语气不确定的陈述句。
whether不能省略，意为“是否”，不能用if替换。
◆His question is whether they can be friends.他的问题是他们能否成为朋友。
3．连接代词、连接副词引导表语从句时连接词不能省略，并在从句中充当句子成分。
◆I’d like to start my own business—that’s what I’d do if I had the money.如果我有钱，我会自己做买卖，那就是我想做的事情。
4．表语从句要用陈述语序，即主谓语序。
常见的表语从句句型：(1)It looks/seems as if…好像……；仿佛……(2)This is because…这是因为……(强调原因)(3)The reason why…is that………的原因是……(4)That is why…那就是……的原因(强调结果)(5)The question/problem is whether/when/where…问题是……(6)His dream/suggestion/aim/purpose is that…他的梦想/建议/目标/目的是……(7)what从句＋be＋that从句◆What surprised us most was that he came late again.最让我们惊讶的是他又迟到了。
