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专题10 名词性从句
目录
01考情透视·目标导航 2
02知识导图·思维引航 3
03考点突破·考向探究 4
考点一 考查宾语从句的连接词 4
【真题研析】 4
【核心精讲】 4
【命题预测】 5
考点二 考查表语从句的连接词 6
【真题研析】 6
【核心精讲】 6
【命题预测】 7
考点三 考查主语从句的连接词 8
【真题研析】 8
【核心精讲】 8
【命题预测】 10
04 重难点突破 名词性从句基本知识的综合运用 10
名词性从句
考点 目标要求 考题统计及展示 考情分析
考查宾语从句的连接词 熟练掌握宾语从句的连接词的用法 （2024·全国甲卷）43.what （2022年1月浙江）if/whether (2021·全国乙卷)what 从近三年高考试题来看，试题以语法填空的形式命题，题目中等，以考查学生对有关名词性从句的理解和应用，强化语言运用能力和语境理解。 预计在2025年高考中，以语法填空的形式命题。名词性从句是轮考点。
考查表语从句的连接词 熟练掌握表语从句的连接词的用法 （2024年1月浙江高考真题）59.what （2023·新高考II卷）why (2021·全国甲卷)that
考查主语从句的连接词 掌握主语从句的连接词的用法 （2021新课标I卷）what
考点一 考查宾语从句的连接词
1.（2024·全国甲卷）How did the national park system come about On a cool, starry night in mid-September 1870, four men relaxed before a campfire along the Firehole River in 43 is now northwestern Wyoming.
2.（2022年1月浙江）Cobb, for her party, started to ask conference organizers who invited her to speak ______ she could do so remotely.
3．(2021·全国乙卷)Also, it gives our parents more time to do__________they like and it improves the family relationship.
3．Live big and try to let your courage outweigh your fear. You never know__________it might lead you in the life journey.
4．In October 2021, the Hubei Provincial Museum issued 10,000 digital copies of the sword of Gou Jian, a famous cultural relic on display at the museum. Its popularity could be seen by__________quickly it sold out.
宾语从句
1.宾语从句的引导词
引导词 作用
连接词 that, whether, if 只起连接作用，不在从句中作成分
连接代词 what, who, whom，which，whichever，whatever, whoever 在从句中作主语、宾语、表语或定语
连接副词 when, where, how, why 在从句中作状语
①I'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。
②We promise whoever attends the party will have a chance to have a photo taken with the movie star.我们保证，任何参加这个聚会的人都有机会与那个电影明星合影。
③I don't know whether to set off for Beijing or not.我不知道是否出发去北京。
(1)that引导宾语从句时，常被省去，但下列情况下不能省略：①动词后跟有多个that引导的宾语从句时，只有第一个that可省略，其余的不可省略；②宾语从句前有插入语时；③that引导的从句位于句首时。
(2)一般情况下介词后只能用wh-类连接词引导宾语从句。介词后的宾语从句，连接词表示“是否”时，只能用whether，不能用if。
2．形式宾语【高频再现】
宾语一般放在及物动词或介词之后，但是，在下列情况下，须用it作形式宾语，而将真正的宾语(常为不定式/从句)后置。
(1)动词find/feel/think/consider/make＋it＋宾补(形容词或名词)＋不定式/从句
(2)动词hate/like/dislike/appreciate/enjoy＋it＋从句
(3)短语动词see to/depend on/rely on＋it＋从句
(4)固定搭配take it for granted that/owe it to sb. that＋从句
Most of us young men take it for granted that parents do everything for us.我们大部分年轻人认为父母为我们做的一切是理所当然的。
I shall see to it that he is taken good care of when you are absent.当你不在的时候，我负责把他照顾好。
3．宾语从句的时态
一般情况下，宾语从句须与主句的时态保持一致，即主句是一般现在时，从句可根据具体情况选用合适的时态；主句为过去的某种时态，从句须用相应的过去的某种时态。当从句的内容为真理或客观事实时，须用一般现在时。
1.（2025·河北省石家庄市第二中学高三上学期月考）It wasn’t just physical training, but also mental toughening. They understood then Shaolin monks have such a reputation.
2.（2025·江苏省海安高级中学高三月考）Legend has it Yu the Great was rewarded with a piece of Nian Gao by the emperor for his heroic deeds.
3.（2025·辽宁省沈文新高考研究联盟高三月考）They think 12 yuan for an order is too much. Besides, many more people doubt ____________ these collectors will wash their hands after dealing with the trash.
4.（2025·内蒙古多校高三上学期第一次联考）A better understanding of this unique coloration could help inform the brown-and-white pandas in captivity. To understand lies behind the trait (特征), researchers studied Qizai, a male brown panda rescued as a cub in 2009 from Foping National Nature Reserve in Hanzhong.
考点二 考查表语从句的连接词
1.（2024年1月浙江高考真题）If most of their customers are happy to buy larger quantities, that’s 59 they’ll promote. But that leaves the solo (单独) customers out of pocket and disappointed.
2.（2023·新高考Ⅱ卷）This is　　　　　　 they need an English trainer.
3．(2021·全国甲卷)One of the ground rules of the swap should be__________everyone must try on the clothes before they take them.
名词性从句中that与what的区别：
引导名词性从句既可以用that，也可以用what。两者的区别在于that在句中不作成分，what在从句中作主语、宾语或表语。
4.（2018年江苏卷）By boat is the only way to get here, which is _______ we arrived.
表语从句
1.表语从句的引导词
引导词 作用
连接词 that, whether 只起连接作用，不在从句中作成分
连接代词 what, who, whom, which，whichever, whatever，whoever 在从句中作主语、宾语、表语或定语
连接副词 when, where, how, why 在从句中作状语
The most important result for the user is that the product does what is intended.
对用户来说最重要的是产品达到了预期的效果。
This is where we usually think it's easier to just give up.
这就是我们通常认为更容易放弃的地方。
if不能引导表语从句；that引导表语从句时不能省略。
2．as if/as though引导表语从句
as if/as though意为“好像，仿佛”，引导的表语从句常跟在系动词(如seem, appear, look, taste, sound, feel, smell等)之后。若表语从句所述的是非真实的情况，从句用虚拟语气；若所述的是事实或是极可能发生的情况，从句用陈述语气。
The thick smog covered the whole city. It was as if a great black blanket had been thrown over it.
厚重的烟雾覆盖着整个城市，好像把一个厚厚的黑色的毯子扔到了它的上面。
3．其他常考的表语从句【高频再现】
(1)This/That/It is why＋表语从句(表示结果)“这/那就是……的原因”
(2)This/That/It is because＋表语从句(表示原因)“这/那是因为……”
(3)The reason why... is that＋表语从句“……的原因是……”
1.（2025·湖北省腾云联盟高三联考）As the Chinese saying goes, “Roads lead to riches.” And this is Somxay Laolion, a Laotian driver on the China-Laos Railway, has observed over the past two-and-a-half years.
3.（2021年天津卷）What puzzles Lily's friends is ________ she always has so many crazy ideas.
4．(2024·河北省唐山市阶段检测)The best times were ________ they had sleepovers and could sit up late talking about anything and everything and everyone.
5．(2024·山西省运城市高三阶段检测)It is advised that one mustn't go jogging very early in the morning; this is ________ the body temperature is lower and the bodily functions haven't kicked in fully during this time.
考点三 考查主语从句的连接词
1.（2021新课标I卷）_____________is so breathtaking about the experience is the out-of-this-world scenes.
2.（2024·湖北省宜荆荆随联考）Moreover, the silk texture and colour have both grown inconsistent makes creating the necessary raw materials and matching the colour difficult. The advanced technology is helping them with the restoration.
what & that在名词性从句中的用法：
that是从属连词，在名词性从句中不充当任何成分，也没有任何意义。而what是连接代词，在名词性从句中充当成分，通常充当主语、宾语或表语。
I believe that I will succeed if I study hard.我相信如果我努力学习我会成功的。
3．(2020·江苏卷)It is not a problem__________we can win the battle; it's just a matter of time.
whether与if引导主语从句的区别：
主语从句位于主句的谓语动词前，表示“是否”，只能用whether而不能用if引导；若用it作形式主语，则if与whether可互换。
Whether we can have clean drinking water lies in what effective measures will be taken by the government about water pollution.
我们能否有干净的饮用水在于政府将采取什么样的有效措施处理水污染问题。
It remains to be seen whether/if this idea can be put into practice.
这一想法能否付诸实施还有待观察。
主语从句
1.主语从句的引导词
引导词 作用
连接词 that, whether, if 只起连接作用，不在从句中作成分
连接代词 what, who, whom，which, whichever，whatever, whoever 在从句中作主语、宾语、表语或定语
连接副词 when, where，how, why 在从句中作状语
When the delayed flight will take off depends much on the weather.
延迟的飞机何时起飞在很大程度上取决于天气。
Where Professor Han was born is known to the public.韩教授出生的地方人人皆知。
What struck me most in the movie was the father's deep love for his son.
影片中最打动我的是父亲对儿子深深的爱。
(1)that引导主语从句时一般不省略。
That they were in truth sisters was clear from the facial similarity between them.从她们的面貌相似度就能清楚地看出她们是亲姐妹。
(2)whether与if引导主语从句的区别：
主语从句位于主句的谓语动词前，表示“是否”，只能用whether而不能用if引导；若用it作形式主语，则if与whether可互换。
Whether we can have clean drinking water lies in what effective measures will be taken by the government about water pollution.
我们能否有干净的饮用水在于政府将采取什么样的有效措施处理水污染问题。
It remains to be seen whether/if this idea can be put into practice.
这一想法能否付诸实施还有待观察。
2．形式主语【高频再现】
it作形式主语的常见句型：
(1)It＋be＋形容词(necessary/likely/important/certain等)＋that从句
(2)It＋be＋名词(短语)(a pity/a shame/no wonder等)＋that从句
(3)It＋be＋过去分词(said/told/reported等)＋that从句
(4)It＋不及物动词(seem, appear, happen, matter等)＋that从句
It is uncertain what side effect the medicine will bring about，although about two thousand patients have taken it.
尽管大约两千名患者已经服用了这种药，但是它会带来什么样的副作用还不清楚。
It doesn't matter whether you pay by cash or credit card in this store.在这个商店里你用现金支付还是信用卡支付都没有关系。
1.（2025·广东省汕尾市四校联考高三月考）________truly attracts their attention is the sense of fulfillment that comes with strategic spending and saving.
2．(2025·陕西省榆林市高三模拟)________ breaks the school rules will be punished to do extra cleaning for a week.
3.（2024·江苏省无锡市期中教学质量调研测试） makes Wuzhen stand out is the combination of culture and local cuisine.
04重难点突破 名词性从句基本知识的综合运用
名词性从句考点的解题关键：
1．确定是名词性从句
空处无提示词，先确定主句的主谓结构，再确定空处和空后的内容在主句中充当主语、宾语、表语或同位语。
2．利用两个技巧搞定名词性从句
Tip1：分析句子成分
(1)从句中缺少主语、宾语、表语，用连接代词what、who、whom、which、whatever等。
(2)从句中缺少状语(结合句意判断)，用连接副词where (表地点)、when (表时间)、how (表方式)、why (表原因)等。
(3)从句中不缺成分，句意缺少“是否”，用if/whether。
(4)从句中不缺成分且句子意义完整，用that。
Tip2：结合句意和引导词的本义解题
有些引导词在句中有很鲜明的意义，如whether/if (是否)、whoever (无论谁)、whatever (无论什么)、because (因为)、why (为什么)等。结合句意和语境，不难解决这类试题。
3．牢记what和that的区别
(1)that没有词义，且在从句中不作任何成分。
(2)what在从句中表示 “……的(东西)” (有时候可以不译)，在从句中充当主语、宾语、表语、定语等成分。
1．what与that
(1)that在名词性从句中具有“两无”“一不”特征——无意义、无成分，(除宾语从句外)不可省略。
that在名词性从句中没有意义，而且不充当句子成分。that引导宾语从句作及物动词的宾语时可省略；在引导主语从句、表语从句和同位语从句时，that不可省略。
I think (that) you should turn to the teacher for help.
我认为你应该向老师寻求帮助。
My decision is that all of us are to start at 6 o'clock tomorrow morning.
我的决定是我们所有人明天早上6点出发。
(2)what在名词性从句中具有“两有”“一不”特征——有意义、有成分，不可省略。
what在引导名词性从句时，有一定的意义，一般可译为“……的东西/事情/话等”；what在从句中充当主语、宾语、表语和定语，不可省略。
What was most important to her, she told me, was her family.
她告诉我，对她来说最重要的是她的家庭。
2．whether与if
在引导名词性从句时，这两个连词常常通用。但是在下面情况下，一般用whether。
(1)引导主语/表语/同位语从句时；
(2)引导的从句在介词后时；
(3)与or not直接连用时；
(4)与动词不定式连用时。
3．what与which
what与which在引导名词性从句时，既可以作主语、宾语，又可以作定语。但如果有明确的“范围”时，应用which，而不用what。
语法填空
（2025·河北省唐县第一中学高三月考）阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。（标黄题号为本专题考点）
Golf courses around the US are being closed faster than they’re being opened. Recently, near Akron, Ohio, 1 abandoned golf course 2 (rewild) into a splendid slice of nature. The vast area of the fairway is often reclaimed (开垦) by nature, but not always by native vegetation. 3 (lucky), the way that the people managed the non-native grass held down the growth of native species, 4 (make) them easily become prey 5 invasive colonizer species. “Golf courses are tough environments, and 6 (create) them, the vegetation used is usually non-native. That’s 7 it doesn’t have any value for our local fish and wildlife.” the local conservationists explained. They suggested undoing the golf course before they could restore the landscape.
8 big the job was, it offered the non-profit conservation group a tremendous opportunity to connect two of existing properties into a single, 1,900-acre paradise (乐园) for fish, birds, and native plants. The 9 (respond) from wildlife has been huge. The conservationists 10 (document) about 200 species of plant and wildlife that were living on the golf course at the time they acquired it. Today they have recorded over 900 species of fish and wildlife that have returned to this area.
21世纪教育网(www.21cnjy.com)专题10 名词性从句
目录
01考情透视·目标导航 2
02知识导图·思维引航 3
03考点突破·考向探究 4
考点一 考查宾语从句的连接词 4
【真题研析】 4
【核心精讲】 5
【命题预测】 6
考点二 考查表语从句的连接词 7
【真题研析】 7
【核心精讲】 8
【命题预测】 9
考点三 考查主语从句的连接词 10
【真题研析】 10
【核心精讲】 11
【命题预测】 12
04 重难点突破 名词性从句基本知识的综合运用 13
名词性从句
考点 目标要求 考题统计及展示 考情分析
考查宾语从句的连接词 熟练掌握宾语从句的连接词的用法 （2024·全国甲卷）43.what （2022年1月浙江）if/whether (2021·全国乙卷)what 从近三年高考试题来看，试题以语法填空的形式命题，题目中等，以考查学生对有关名词性从句的理解和应用，强化语言运用能力和语境理解。 预计在2025年高考中，以语法填空的形式命题。名词性从句是轮考点。
考查表语从句的连接词 熟练掌握表语从句的连接词的用法 （2024年1月浙江高考真题）59.what （2023·新高考II卷）why (2021·全国甲卷)that
考查主语从句的连接词 掌握主语从句的连接词的用法 （2021新课标I卷）what
考点一 考查宾语从句的连接词
1.（2024·全国甲卷）How did the national park system come about On a cool, starry night in mid-September 1870, four men relaxed before a campfire along the Firehole River in 43 is now northwestern Wyoming.
【答案】what
【解析】考查宾语从句。句意：1870年9月中旬，在一个凉爽、繁星点点的夜晚，四个男人在火洞河边的营火前放松，这里现在是怀俄明州的西北部。后文为介词in的宾语，is前缺主语，指物，主语用what引导宾语从句，作介词in的宾语，故填what。
2.（2022年1月浙江）Cobb, for her party, started to ask conference organizers who invited her to speak ______ she could do so remotely.
【答案】if/whether
【解析】考查宾语从句。句意：对于她的出席，Cobb开始询问邀请她的组织者是否可以远程进行。显然ask后面出现了一个宾语从句，宾语从句句意不完整，whether/if“是否”符合语境，故填whether或if。
3．(2021·全国乙卷)Also, it gives our parents more time to do__________they like and it improves the family relationship.
【答案】what
【解析】考查宾语从句。句意：这给了父母更多的时间去做他们喜欢的事情，并改善了家庭关系。do后面缺宾语，所以后面应该是宾语从句，连词在从句中充当宾语。故填what。
3．Live big and try to let your courage outweigh your fear. You never know__________it might lead you in the life journey.
【答案】where
【解析】考查宾语从句的连接词。句意：大胆地生活，让你的勇气战胜你的恐惧。在人生旅途中，你永远不知道勇气会把你带往何处。空处所填词引导宾语从句，从句缺少地点状语，故用where(何处)。
4．In October 2021, the Hubei Provincial Museum issued 10,000 digital copies of the sword of Gou Jian, a famous cultural relic on display at the museum. Its popularity could be seen by__________quickly it sold out.
【答案】how
【解析】考查宾语从句的连接词。句意：它的受欢迎程度可以从它很快被销售一空看出。“__________quickly it sold out”在介词by之后作宾语，故空处应填入宾语从句的连接词。所填词修饰副词quickly，表示程度，故用how引导该宾语从句，how表示“多么”。
宾语从句
1.宾语从句的引导词
引导词 作用
连接词 that, whether, if 只起连接作用，不在从句中作成分
连接代词 what, who, whom，which，whichever，whatever, whoever 在从句中作主语、宾语、表语或定语
连接副词 when, where, how, why 在从句中作状语
①I'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。
②We promise whoever attends the party will have a chance to have a photo taken with the movie star.我们保证，任何参加这个聚会的人都有机会与那个电影明星合影。
③I don't know whether to set off for Beijing or not.我不知道是否出发去北京。
(1)that引导宾语从句时，常被省去，但下列情况下不能省略：①动词后跟有多个that引导的宾语从句时，只有第一个that可省略，其余的不可省略；②宾语从句前有插入语时；③that引导的从句位于句首时。
(2)一般情况下介词后只能用wh-类连接词引导宾语从句。介词后的宾语从句，连接词表示“是否”时，只能用whether，不能用if。
2．形式宾语【高频再现】
宾语一般放在及物动词或介词之后，但是，在下列情况下，须用it作形式宾语，而将真正的宾语(常为不定式/从句)后置。
(1)动词find/feel/think/consider/make＋it＋宾补(形容词或名词)＋不定式/从句
(2)动词hate/like/dislike/appreciate/enjoy＋it＋从句
(3)短语动词see to/depend on/rely on＋it＋从句
(4)固定搭配take it for granted that/owe it to sb. that＋从句
Most of us young men take it for granted that parents do everything for us.我们大部分年轻人认为父母为我们做的一切是理所当然的。
I shall see to it that he is taken good care of when you are absent.当你不在的时候，我负责把他照顾好。
3．宾语从句的时态
一般情况下，宾语从句须与主句的时态保持一致，即主句是一般现在时，从句可根据具体情况选用合适的时态；主句为过去的某种时态，从句须用相应的过去的某种时态。当从句的内容为真理或客观事实时，须用一般现在时。
1.（2025·河北省石家庄市第二中学高三上学期月考）It wasn’t just physical training, but also mental toughening. They understood then Shaolin monks have such a reputation.
【答案】why
【解析】考查宾语从句。句意：他们那时才明白了少林僧人为何有如此声誉。分析句子成分可知，空处考查宾语从句的引导词，根据句意可知，宾语从句缺少原因状语，用why引导。故填why。
2.（2025·江苏省海安高级中学高三月考）Legend has it Yu the Great was rewarded with a piece of Nian Gao by the emperor for his heroic deeds.
【答案】that
【解析】考查宾语从句。 句意：相传大禹因其英勇事迹被皇帝赏赐了一块年糕。it为形式宾语，本空引导真正的宾语从句，从句不缺少成分或含义，用that引导。故填that。
3.（2025·辽宁省沈文新高考研究联盟高三月考）They think 12 yuan for an order is too much. Besides, many more people doubt ____________ these collectors will wash their hands after dealing with the trash.
【答案】whether/if
【解析】 whether/if考查宾语从句。句意：此外，更多的人怀疑这些清洁工在处理完垃圾后是否会洗手。这里为宾语从句的引导词，从句中不缺少成分，表示“是否”。用whether或if。故填whether/if。
4.（2025·内蒙古多校高三上学期第一次联考）A better understanding of this unique coloration could help inform the brown-and-white pandas in captivity. To understand lies behind the trait (特征), researchers studied Qizai, a male brown panda rescued as a cub in 2009 from Foping National Nature Reserve in Hanzhong.
【答案】what
【解析】考查宾语从句。句意：为了了解这一特征背后的原因，研究人员研究了七仔，一只雄性棕色大熊猫，2009年时还是幼崽的时候从汉中佛坪国家级自然保护区被救出。这里为宾语从句的连接词，宾语从句中缺少主语，指物，用连接词what引导宾语从句。故填what。
考点二 考查表语从句的连接词
1.（2024年1月浙江高考真题）If most of their customers are happy to buy larger quantities, that’s 59 they’ll promote. But that leaves the solo (单独) customers out of pocket and disappointed.
【答案】what
【解析】考查名词性从句。句意：如果他们的大多数客户都乐意大量购买，那他们就会推广。在表语从句中缺少宾语，且是指事物，所以应用连接代词what。故填what。
2.（2023·新高考Ⅱ卷）This is　　　　　　 they need an English trainer.
【答案】why　
【解析】考查表语从句。句意:这就是他们需要一名英语教练的原因。本空引导表语从句,根据句意可知,本空在从句中作原因状语,故应用连接副词why。
3．(2021·全国甲卷)One of the ground rules of the swap should be__________everyone must try on the clothes before they take them.
【答案】that
【解析】考查表语从句。句意：交换的基本原则之一是每个人在带走之前必须要试穿衣服。从句中意思完整，不缺成分，故填that。
名词性从句中that与what的区别：
引导名词性从句既可以用that，也可以用what。两者的区别在于that在句中不作成分，what在从句中作主语、宾语或表语。
4.（2018年江苏卷）By boat is the only way to get here, which is _______ we arrived.
【答案】how
【解析】考查名词性从句。句意：乘船是到达这里唯一的途径，这就是我们如何到达的。分析which引导的非限定性定语从句可知，后面为表语从句。分析句意可知，这里用连接副词how引导表语从句，充当方式状语，表示“如何”。故选D。
表语从句
1.表语从句的引导词
引导词 作用
连接词 that, whether 只起连接作用，不在从句中作成分
连接代词 what, who, whom, which，whichever, whatever，whoever 在从句中作主语、宾语、表语或定语
连接副词 when, where, how, why 在从句中作状语
The most important result for the user is that the product does what is intended.
对用户来说最重要的是产品达到了预期的效果。
This is where we usually think it's easier to just give up.
这就是我们通常认为更容易放弃的地方。
if不能引导表语从句；that引导表语从句时不能省略。
2．as if/as though引导表语从句
as if/as though意为“好像，仿佛”，引导的表语从句常跟在系动词(如seem, appear, look, taste, sound, feel, smell等)之后。若表语从句所述的是非真实的情况，从句用虚拟语气；若所述的是事实或是极可能发生的情况，从句用陈述语气。
The thick smog covered the whole city. It was as if a great black blanket had been thrown over it.
厚重的烟雾覆盖着整个城市，好像把一个厚厚的黑色的毯子扔到了它的上面。
3．其他常考的表语从句【高频再现】
(1)This/That/It is why＋表语从句(表示结果)“这/那就是……的原因”
(2)This/That/It is because＋表语从句(表示原因)“这/那是因为……”
(3)The reason why... is that＋表语从句“……的原因是……”
1.（2025·湖北省腾云联盟高三联考）As the Chinese saying goes, “Roads lead to riches.” And this is Somxay Laolion, a Laotian driver on the China-Laos Railway, has observed over the past two-and-a-half years.
【答案】what
【解析】考查名词性从句。句意：这是中老铁路上的老挝司机颂赛·劳利翁在过去两年半里所观察到的。根据空格前的is可知，空格处引导表语从句，且从句中动词observe后缺少宾语，需要what引导从句。故填what。
3.（2021年天津卷）What puzzles Lily's friends is ________ she always has so many crazy ideas.
【答案】why
【解析】考查表语从句。句意：令Lily的朋友们感到困扰的是她为什么总是有这么多疯狂的想法。分析句子，该空需要一个表语从句的连接词，结合句意，应该是朋友们不明白Lily 为什么有这么多疯狂的想法。所以本句为why引导的表语从句。故填why。
4．(2024·河北省唐山市阶段检测)The best times were ________ they had sleepovers and could sit up late talking about anything and everything and everyone.
【答案】when　
【解析】考查表语从句。句意：最好的时光是他们在别人家过夜的时候，可以坐到很晚，谈论任何事，所有人。when引导表语从句，在从句中作时间状语。故填when。
5．(2024·山西省运城市高三阶段检测)It is advised that one mustn't go jogging very early in the morning; this is ________ the body temperature is lower and the bodily functions haven't kicked in fully during this time.
【答案】because　
【解析】句意：建议不要在早晨很早去慢跑，这是因为在这段时间里，体温较低，身体机能没有完全发挥作用。because引导表语从句，在从句中作原因状语。故填because。
考点三 考查主语从句的连接词
1.（2021新课标I卷）_____________is so breathtaking about the experience is the out-of-this-world scenes.
【答案】What
【解析】考查主语从句。句意为：这段经历让人叹为观止的是那些超凡脱俗的场景。引导主语从句,在从句中作主语,表示"……的东西",故填What.
2.（2024·湖北省宜荆荆随联考）Moreover, the silk texture and colour have both grown inconsistent makes creating the necessary raw materials and matching the colour difficult. The advanced technology is helping them with the restoration.
【答案】that
【解析】考查主语从句。句意：此外，丝绸的质地和颜色都变得不一致，这使得创造必要的原材料和匹配颜色变得困难。分析句子可知，空处引导名词性从句作句子的主语，主句从句的成分和语义均完整，因此应用只起连接作用、无实意的that引导。故填that。
what & that在名词性从句中的用法：
that是从属连词，在名词性从句中不充当任何成分，也没有任何意义。而what是连接代词，在名词性从句中充当成分，通常充当主语、宾语或表语。
I believe that I will succeed if I study hard.我相信如果我努力学习我会成功的。
3．(2020·江苏卷)It is not a problem__________we can win the battle; it's just a matter of time.
【答案】whether/if
【解析】考查主语从句。句意：我们是否能赢得战斗不是问题；这只是时间问题。
whether与if引导主语从句的区别：
主语从句位于主句的谓语动词前，表示“是否”，只能用whether而不能用if引导；若用it作形式主语，则if与whether可互换。
Whether we can have clean drinking water lies in what effective measures will be taken by the government about water pollution.
我们能否有干净的饮用水在于政府将采取什么样的有效措施处理水污染问题。
It remains to be seen whether/if this idea can be put into practice.
这一想法能否付诸实施还有待观察。
主语从句
1.主语从句的引导词
引导词 作用
连接词 that, whether, if 只起连接作用，不在从句中作成分
连接代词 what, who, whom，which, whichever，whatever, whoever 在从句中作主语、宾语、表语或定语
连接副词 when, where，how, why 在从句中作状语
When the delayed flight will take off depends much on the weather.
延迟的飞机何时起飞在很大程度上取决于天气。
Where Professor Han was born is known to the public.韩教授出生的地方人人皆知。
What struck me most in the movie was the father's deep love for his son.
影片中最打动我的是父亲对儿子深深的爱。
(1)that引导主语从句时一般不省略。
That they were in truth sisters was clear from the facial similarity between them.从她们的面貌相似度就能清楚地看出她们是亲姐妹。
(2)whether与if引导主语从句的区别：
主语从句位于主句的谓语动词前，表示“是否”，只能用whether而不能用if引导；若用it作形式主语，则if与whether可互换。
Whether we can have clean drinking water lies in what effective measures will be taken by the government about water pollution.
我们能否有干净的饮用水在于政府将采取什么样的有效措施处理水污染问题。
It remains to be seen whether/if this idea can be put into practice.
这一想法能否付诸实施还有待观察。
2．形式主语【高频再现】
it作形式主语的常见句型：
(1)It＋be＋形容词(necessary/likely/important/certain等)＋that从句
(2)It＋be＋名词(短语)(a pity/a shame/no wonder等)＋that从句
(3)It＋be＋过去分词(said/told/reported等)＋that从句
(4)It＋不及物动词(seem, appear, happen, matter等)＋that从句
It is uncertain what side effect the medicine will bring about，although about two thousand patients have taken it.
尽管大约两千名患者已经服用了这种药，但是它会带来什么样的副作用还不清楚。
It doesn't matter whether you pay by cash or credit card in this store.在这个商店里你用现金支付还是信用卡支付都没有关系。
1.（2025·广东省汕尾市四校联考高三月考）________truly attracts their attention is the sense of fulfillment that comes with strategic spending and saving.
【答案】What
【解析】考查主语从句。句意：真正吸引他们注意力的是策略性消费和储蓄带来的满足感。is前面为主语从句，从句部分缺少主语，表示事物，用连接代词what引导从句，放在句首，首字母大写。故填What。
2．(2025·陕西省榆林市高三模拟)________ breaks the school rules will be punished to do extra cleaning for a week.
【答案】Whoever
【解析】考查主语从句的连接词。句意：违反学校规定的人将被惩罚做一周的额外清洁。此处主语从句缺主语，whoever作主语，意为：不论谁。故填Whoever。
3.（2024·江苏省无锡市期中教学质量调研测试） makes Wuzhen stand out is the combination of culture and local cuisine.
【答案】What
【解析】考查主语从句。句意：乌镇的突出之处在于文化与当地美食的结合。空处引导主语从句，从句缺少主语，指物，需用连接代词what引导，位于句首，首字母需大写。故填What。
04重难点突破 名词性从句基本知识的综合运用
名词性从句考点的解题关键：
1．确定是名词性从句
空处无提示词，先确定主句的主谓结构，再确定空处和空后的内容在主句中充当主语、宾语、表语或同位语。
2．利用两个技巧搞定名词性从句
Tip1：分析句子成分
(1)从句中缺少主语、宾语、表语，用连接代词what、who、whom、which、whatever等。
(2)从句中缺少状语(结合句意判断)，用连接副词where (表地点)、when (表时间)、how (表方式)、why (表原因)等。
(3)从句中不缺成分，句意缺少“是否”，用if/whether。
(4)从句中不缺成分且句子意义完整，用that。
Tip2：结合句意和引导词的本义解题
有些引导词在句中有很鲜明的意义，如whether/if (是否)、whoever (无论谁)、whatever (无论什么)、because (因为)、why (为什么)等。结合句意和语境，不难解决这类试题。
3．牢记what和that的区别
(1)that没有词义，且在从句中不作任何成分。
(2)what在从句中表示 “……的(东西)” (有时候可以不译)，在从句中充当主语、宾语、表语、定语等成分。
1．what与that
(1)that在名词性从句中具有“两无”“一不”特征——无意义、无成分，(除宾语从句外)不可省略。
that在名词性从句中没有意义，而且不充当句子成分。that引导宾语从句作及物动词的宾语时可省略；在引导主语从句、表语从句和同位语从句时，that不可省略。
I think (that) you should turn to the teacher for help.
我认为你应该向老师寻求帮助。
My decision is that all of us are to start at 6 o'clock tomorrow morning.
我的决定是我们所有人明天早上6点出发。
(2)what在名词性从句中具有“两有”“一不”特征——有意义、有成分，不可省略。
what在引导名词性从句时，有一定的意义，一般可译为“……的东西/事情/话等”；what在从句中充当主语、宾语、表语和定语，不可省略。
What was most important to her, she told me, was her family.
她告诉我，对她来说最重要的是她的家庭。
2．whether与if
在引导名词性从句时，这两个连词常常通用。但是在下面情况下，一般用whether。
(1)引导主语/表语/同位语从句时；
(2)引导的从句在介词后时；
(3)与or not直接连用时；
(4)与动词不定式连用时。
3．what与which
what与which在引导名词性从句时，既可以作主语、宾语，又可以作定语。但如果有明确的“范围”时，应用which，而不用what。
语法填空
（2025·河北省唐县第一中学高三月考）阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。（标黄题号为本专题考点）
Golf courses around the US are being closed faster than they’re being opened. Recently, near Akron, Ohio, 1 abandoned golf course 2 (rewild) into a splendid slice of nature. The vast area of the fairway is often reclaimed (开垦) by nature, but not always by native vegetation. 3 (lucky), the way that the people managed the non-native grass held down the growth of native species, 4 (make) them easily become prey 5 invasive colonizer species. “Golf courses are tough environments, and 6 (create) them, the vegetation used is usually non-native. That’s 7 it doesn’t have any value for our local fish and wildlife.” the local conservationists explained. They suggested undoing the golf course before they could restore the landscape.
8 big the job was, it offered the non-profit conservation group a tremendous opportunity to connect two of existing properties into a single, 1,900-acre paradise (乐园) for fish, birds, and native plants. The 9 (respond) from wildlife has been huge. The conservationists 10 (document) about 200 species of plant and wildlife that were living on the golf course at the time they acquired it. Today they have recorded over 900 species of fish and wildlife that have returned to this area.
【答案】
1．an 2．has been rewilded 3．Unluckily 4．making 5．for 6．to create 7．why 8．However 9．response 10．documented
【解析】本文是一篇说明文。文章主要说明了被遗弃的高尔夫球场被开垦为公共土地，但是原植被大多数是人工栽培的，不利于当地物种繁衍生息。经过再次野化后，野生动物正在回归。
1．考查冠词。句意：最近，在俄亥俄州阿克伦附近，一个废弃的高尔夫球场被重新改造成一片壮丽的自然风光。本句首次提到俄亥俄州某一个高尔夫球场，为泛指。abandoned为元音音素开头的单词。故填an。
2．考查动词的时态、语态与主谓一致。句意：最近，在俄亥俄州阿克伦附近，一个废弃的高尔夫球场被重新改造成一片壮丽的自然风光。结合语境可知该高尔夫球场是被重新野化改造的。主语是单数，句首有现在完成时的时间状语“Recently”，所以为现在完成时的被动语态结构。故填has been rewilded。
3．考查副词。句意：不幸的是，人们管理非本地草的方式抑制了本地物种的生长，使它们很容易成为入侵殖民者物种的猎物。根据上下文可知，此处应该填副词，修饰整个句子。根据句意及逻辑可知，应填Unluckily。注意：句首的单词首字母应大写。故填Unluckily。
4．考查非谓语动词。句意：不幸的是，人们管理非本地草的方式抑制了本地物种的生长，使它们很容易成为入侵殖民者物种的猎物。该句主句的谓语动词为“held down”，分析句子结构可知，空处是非谓语动词作结果状语，表主动。故填making。
5．考查介词。句意：不幸的是，人们管理非本地草的方式抑制了本地物种的生长，使它们很容易成为入侵殖民者物种的猎物。固定搭配become prey for sb./sth.表示“成为……的猎物”。故填for。
6．考查非谓语动词。句意：高尔夫球场环境是恶劣的，为建球场往往会使用非本地生长的植被。此处为非谓语动词作状语，结合句意，此处to do表示“为了……”作目的状语，满足句意要求。故填to create。
7．考查表语从句。句意：这就是为什么它对我们当地的鱼类和野生动物没有任何价值。结合上文语境可知，该句表达了“这就是对我们当地鱼类和野生动植物没有任何价值的原因”，所以此处为连接副词why表示“为什么”引导的表语从句，满足句意要求，在从句中作状语成分。故填why。
8．考查让步状语从句。句意：无论这项工作多么艰巨，它为非营利保护组织提供了一个巨大的机会，将两个现有的物业连接成一个占地1900英亩的鱼、鸟和本地植物的天堂。根据句意以及空后的形容词big可知，此处为连词副词修饰形容词big，结合句意，此处表示“无论多么大”，所以使用however引导的让步状语从句，位于句首，首字母需大写。故填However。
9．考查名词。句意：野生动物的反应是巨大的。空处前面有冠词，空处在句中充当主语。所以为名词形式response。故填response。
10．考查动词时态。句意：自然资源保护主义者记录了大约200种植物和野生动物，这些植物和野生动物在他们获得高尔夫球场时生活在球场上。此处为谓语动词的填入，通过下文可知，环保主义者们在以前接手球场时（at the time they acquired it）记录过高尔夫球场的物种数目，所以此处为一般过去时。故填documented。
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