专题02 主语从句【考点清单】-2024-2025学年高二英语下学期期中考点大串讲（外研版2019）

主语从句 语法精讲: 定义：在主从复合句中作主语的从句称作主语从句。 主语从句语序：陈述性语序。 主语从句的引导词有： 从属连词：that/if/whether 连接代词: who, whom, whose, what, which, whoever, whatever, whichever 连接副词: when, where, why, how 一、that引导的主语从句 1．that在主语从句中不作成分，也没有含义，只起连接作用，但通常不可以省略。 That the earth turns around the sun is known to all. 地球绕着太阳转这一点是总所周知的。 2． 在that引导的主语从句中，有时为避免句子头重脚轻，常用it作形式主语，代替主语从句放在句首，而把主语从句置于句末。常用句型如下：（此时的that可省略） （1）It +be + adj + that 从句（obvious, true, wonderful, good, funny, possible, likely, certain, surprising, necessary, important, natural ） It is certain that… 肯定… It is possible that… 很可能 It is obvious that… 很明显 It is necessary/important/natural/… +that…+(should) do… (动作未发生，用虚拟语气。) It is obvious that this measure is effective. 很明显，这一措施是有效的。 [温馨提示] 在句型“It +be + adj + that 从句”中，如果形容词为necessary, important, natural等，主语从句要用虚拟语气，即“It is necessary/important…+that+主语+（should）动词原形+其他”。 It is necessary that a college student (should) master one or two foreign language. 大学生掌握一两门外语是非常必要的。 It is important that you (should) ask your parents for advice about your choice. 向你的父母征求关于你的选择的建议是很重要的。 （2）It +be + n + that 从句(no wonder, an honour, a good thing, a pity, a shame, no surprise等) It is a pity/shame that … 遗憾的是… It is a surprise that… 令人惊奇的是… It is a fact that… …是事实 It is common knowledge that … …是常识 It is a pity/shame that we lost the match. 真遗憾啊，我们输掉了比赛。 It is no wonder that he won first place in the English speech contest. 他在英语演讲比赛中获得第一名是不足为奇的。 (3)It +be+ 动词的过去分词 + that 从句(said, believed, reported, thought, expected, decided, announced, arranged， known, suggested等) It is said that… 据说… It is known to all that… 众所周知… It is reported that… 据报道… It is suggested that +(should) do… 建议… It is believed that hard work will pay off. 人们相信,努力工作会有好结果。 [温馨提示] 如果过去分词为表示建议、命令、要求等含义的词（suggested、advised、demanded、 ordered、 insisted 、requested等），从句用虚拟语气，谓语动词的形式为“(should+)动词原形”。 It is suggested that you (should) spend more time in studying English. 建议你花更多的时间来学习英语。 (4)It +不及物动词+that从句 (happen, seem, occur to me, appear等) It happened that… 碰巧… It occurred to me that… 我突然想起… It seems that… 似乎/好像… It happened that I went to visit my first teacher that day. 碰巧那天我去拜访了我的启蒙老师。 二、if/whether引导的主语从句 当主语从句本身含有是否的意思时，连接词必须用if或whether。whether/if在从句中只起连接作用，在句子中不作成分，且不可省略。但是，如果主语从句位于句首时，只能用whether，不能用if。 如： Whether he will come or not is not yet known. 目前还不清楚他是否会来。 这种情况下，因为主语从句比较长，会导致头重脚轻的情况，所以经常用形式主语it来代替，而把主语从句放到句末去。此时，连接词用whether/if都可以。 It is not yet known if/whether he will come or not. 目前还不清楚他是否会来。 三、连接代词引导的主语从句 常用来连接主语从句的连接代词有：who、whom、whose、what, which、whoever、whatever、whichever等。这些连接代词在从句中起连接作用，同时在从句中作主语、宾语、表语、定语成分，且不可以省略。 如：Who will go is not important. 谁去参加并不重要。 What we need is more practice. 我们需要的是更多的练习。 Whatever I have done is only for you. 无论我做了什么，都是为了你。 为了避免头重脚轻，这种情况下的主语从句也经常用形式主语it来代替，而把主语从句放到句末。但是，连接代词始终都不能省略。 Who won the game hasn't been announced yet. It hasn't been announced yet who won the game. 这场比赛的获胜者尚未公布。 四、连接副词引导的主语从句 用来连接主语从句的连接副词主要有：when、where、why、how等。这些连接副词在主语从句中作状语。如： When they will arrive at the station doesn't matter. 他们何时到站没有什么关系。 How the accident happened is still unknown. 这场事故是怎么发生的，还不清楚。 Why he was absent from the meeting remains a mystery. 他为什么没有参加会议仍然是个谜。 Where I will spend my summer is none of your business. 我在哪里过暑假不关你的事。 为了避免头重脚轻，上面的句子可以改为： It doesn't matter when they will arrive at the station. It is still unknown how the accident happened. It remains a mystery why he was absent from the meeting. It is none of your business where I will spend my summer. 五、主语从句的注意事项 1．从句的语序 在任何情况下,主语从句都用陈述语序。 Whichever of you gets here first will get the prize. 你们谁第一个到达这里，谁就获奖。 How he succeeded is still a puzzle. 他是如何成功的仍然是个谜。 2．主谓一致 ①主句谓语用单数的情况： a.单个从句作主语时 What little she said has left us much to think about. 她说的短短几句话令我们深思。 b.两个或两个以上的连接词引导一个主语从句时 When and where the conference will be held has not been decided yet. 会议将在何时何地举行还没定下来。 ②主句谓语用复数的情况：由and连接的两个或两个以上的主语从句并列作主语时 When they will set off for London and where they will stay have not been decided yet. 他们将于何时出发去伦敦以及要住在哪里还没定下来。 ③what引导的主语从句作主语时，根据意义一致原则决定主句谓语的数。 a.若表示复数意义，则主句谓语用复数。 What he says and does do not agree. 他言行不一致。 b.若表示单数意义，则主句谓语用单数。 What he says and does does not concern me. 他的言行与我无关。 语法精练: 一、单项选择 1．（24-25高二上·广东江门·期中）_________ is important is that we let others know we care about them. A．That B．How C．What D．Where 2．（24-25高二上·广东江门·期中）_________ we will go there hasn’t been decided. A．Whether B．If C．That D．Where 3．（24-25高二上·广东·期中）He failed in the exam again and __________ made matters worse was __________ he began to lose heart. A．it; that B．that; what C．what; that D．how; when 4．（24-25高二上·广东广州·期中）________ more and more people prefer to live in the countryside is not surprising. A．Why B．Whether C．That D．How 5．（24-25高二上·广东广州·期中）It is raining heavily. ________ depends on the weather. A．When the Sports Meeting will be held B．When the Sports Meeting will hold C．When will the Sports Meeting be held D．When will the Sports Meeting hold 6．（24-25高二上·天津南开·期中）When it comes to staring a business, really matters is a sound business plan, access to capital, and good management skills. A．that B．which C．what D．why 7．（24-25高二上·上海嘉定·期末）It is still a mystery _____ the ancient civilization disappeared without leaving a trace. A．which B．what C．when D．how 8．（24-25高二上·广东清远·期中）________ was to return to school. A．That really interested him B．What really interested him C．Which really interested him D．That interest him really 9．（24-25高二上·广东清远·期中）He excitedly pulled hard at it, and ________ he saw made him shout, “Wow! A big, shiny gold chain!” A．who B．what C．which D．that 10．（24-25高二上·天津蓟州·期中）It astonished me most ______ Alice had said in the meeting last night. A．that B．what C．when D．where 11．（24-25高二上·广东深圳·期中）It is often the case __________ great opportunities come to those who are well prepared. A．why B．what C．as D．that 12．（24-25高二上·广东江门·阶段练习）________governments have addressed the problem of affordable housing reflects their commitment to providing accessible living options for all citizens. A．What B．That C．There D．Whether 13．（24-25高二上·天津北辰·阶段练习）Inspiring others to believe in themselves, Stephen Curry is living proof that ________ other people think of you does not have to influence what you become. A．how B．what C．which D．where 14．（2024·天津·模拟预测）It remains to be seen ________ the new traffic regulations will adapt to the actual situation after they are issued. A．which B．whether C．what D．that 15．（23-24高二下·天津河东·期中）______ came late yesterday was unknown. A．Whomever B．Who C．No matter who D．Whom 16．（24-25高二下·天津滨海新·阶段练习）It is not immediately clear ________ the financial crisis will soon be over. A．that B．what C．which D．whether 17．（24-25高二下·广东深圳·开学考试）______ we understand things has a lot to do with what we feel. A．What B．Why C．Whether D．How 18．（24-25高二下·广东深圳·开学考试）Asian elephants are among the most highly protected animals in China and _____ drove the elephants to make their long trip is still not completely certain. A．that B．which C．who D．what 19．（24-25高二下·广东深圳·开学考试）It is uncertain _____ the rise is caused by more time spent on screens or less time outdoors, but previous studies have suggested daylight exposure is the key. A．how B．where C．what D．whether 20．（24-25高二上·吉林长春·期末）______ house was broken into last night is still unknown. A．Who B．Whom C．Whose D．What 二、语法填空 1．（24-25高二下·海南海口·开学考试） we need more food depends on how many people turn up. (用适当的词填空) 2．（24-25高二下·广东东莞·阶段练习）In fact, we should do is take measures to learn English well. (用适当的词填空) 3．（24-25高二上·福建福州·期末）There is no escape from the long arm of the law. breaks the law will sooner or later be caught and will be punished. （用适当的词填空） 4．（24-25高二下·江苏盐城·阶段练习） he will come or not is still unknown. （用适当的词填空） 5．（2025高三·全国·专题练习）For students, benefits most to their learning is reading English books. (用适当的词填空) 6．（2025高三·全国·专题练习） people forget is that the Italians, when they came to Australia, brought 2, 000 years of their culture, the Greeks some 3, 000 years, and the Chinese more still. (用适当的词填空) 7．（24-25高二下·全国·课后作业）It is believed the divisions between races will disappear some day. (用适当的词填空) 8． （24-25高一下·全国·课后作业）____________matters is not just the outside of a string of symbols, but the inside too, not just how they are arranged but __________they mean. (用适当的词填空) 9．（24-25高一下·全国·课后作业） breaks the law should be punished. (用适当的词填空) 10．（24-25高二下·全国·课后作业）It is unknown he has agreed to my plan. (用适当的词填空) 11．（24-25高二下·全国·课后作业）It’s true inner beauty is very important, but external beauty shouldn’t be completely overlooked. (用适当的词填空) 12．（24-25高二下·全国·课后作业）It is not clear he got here without any money. (用适当的词填空) 13．（24-25高二下·全国·课后作业）It is still unknown the medicine will be effective to human beings. (用适当的词填空) 14．（24-25高二下·全国·课后作业） he turned down the invitation was not clear. (用适当的词填空) 15．（24-25高二下·全国·课后作业） charity they will go to has not been decided. (用适当的词填空) 16．（24-25高二下·全国·课后作业） does wrong to his country or to the people deserves punishment. (用适当的词填空) 17．（24-25高二下·全国·课后作业）It makes no difference to me you like it or not. (用适当的词填空) 18．（24-25高二下·全国·课后作业）It really bothered me he’d forgotten my birthday. （用适当的词填空） 19．（24-25高二下·全国·课后作业） the earth goes around the sun is known to us all. (用适当的词填空) 20．（24-25高一上·上海·期末）It is estimated in the UK alone, people eat three million takeaway meals a day, and the three biggest delivery apps together offer a choice of 100 cuisines from 60, 000 restaurants. (用适当的词填空) / 学科网（北京）股份有限公司 $$ 主语从句 语法精讲: 定义：在主从复合句中作主语的从句称作主语从句。 主语从句语序：陈述性语序。 主语从句的引导词有： 从属连词：that/if/whether 连接代词: who, whom, whose, what, which, whoever, whatever, whichever 连接副词: when, where, why, how 一、that引导的主语从句 1．that在主语从句中不作成分，也没有含义，只起连接作用，但通常不可以省略。 That the earth turns around the sun is known to all. 地球绕着太阳转这一点是总所周知的。 2． 在that引导的主语从句中，有时为避免句子头重脚轻，常用it作形式主语，代替主语从句放在句首，而把主语从句置于句末。常用句型如下：（此时的that可省略） （1）It +be + adj + that 从句（obvious, true, wonderful, good, funny, possible, likely, certain, surprising, necessary, important, natural ） It is certain that… 肯定… It is possible that… 很可能 It is obvious that… 很明显 It is necessary/important/natural/… +that…+(should) do… (动作未发生，用虚拟语气。) It is obvious that this measure is effective. 很明显，这一措施是有效的。 [温馨提示] 在句型“It +be + adj + that 从句”中，如果形容词为necessary, important, natural等，主语从句要用虚拟语气，即“It is necessary/important…+that+主语+（should）动词原形+其他”。 It is necessary that a college student (should) master one or two foreign language. 大学生掌握一两门外语是非常必要的。 It is important that you (should) ask your parents for advice about your choice. 向你的父母征求关于你的选择的建议是很重要的。 （2）It +be + n + that 从句(no wonder, an honour, a good thing, a pity, a shame, no surprise等) It is a pity/shame that … 遗憾的是… It is a surprise that… 令人惊奇的是… It is a fact that… …是事实 It is common knowledge that … …是常识 It is a pity/shame that we lost the match. 真遗憾啊，我们输掉了比赛。 It is no wonder that he won first place in the English speech contest. 他在英语演讲比赛中获得第一名是不足为奇的。 (3)It +be+ 动词的过去分词 + that 从句(said, believed, reported, thought, expected, decided, announced, arranged， known, suggested等) It is said that… 据说… It is known to all that… 众所周知… It is reported that… 据报道… It is suggested that +(should) do… 建议… It is believed that hard work will pay off. 人们相信,努力工作会有好结果。 [温馨提示] 如果过去分词为表示建议、命令、要求等含义的词（suggested、advised、demanded、 ordered、 insisted 、requested等），从句用虚拟语气，谓语动词的形式为“(should+)动词原形”。 It is suggested that you (should) spend more time in studying English. 建议你花更多的时间来学习英语。 (4)It +不及物动词+that从句 (happen, seem, occur to me, appear等) It happened that… 碰巧… It occurred to me that… 我突然想起… It seems that… 似乎/好像… It happened that I went to visit my first teacher that day. 碰巧那天我去拜访了我的启蒙老师。 二、if/whether引导的主语从句 当主语从句本身含有是否的意思时，连接词必须用if或whether。whether/if在从句中只起连接作用，在句子中不作成分，且不可省略。但是，如果主语从句位于句首时，只能用whether，不能用if。 如： Whether he will come or not is not yet known. 目前还不清楚他是否会来。 这种情况下，因为主语从句比较长，会导致头重脚轻的情况，所以经常用形式主语it来代替，而把主语从句放到句末去。此时，连接词用whether/if都可以。 It is not yet known if/whether he will come or not. 目前还不清楚他是否会来。 三、连接代词引导的主语从句 常用来连接主语从句的连接代词有：who、whom、whose、what, which、whoever、whatever、whichever等。这些连接代词在从句中起连接作用，同时在从句中作主语、宾语、表语、定语成分，且不可以省略。 如：Who will go is not important. 谁去参加并不重要。 What we need is more practice. 我们需要的是更多的练习。 Whatever I have done is only for you. 无论我做了什么，都是为了你。 为了避免头重脚轻，这种情况下的主语从句也经常用形式主语it来代替，而把主语从句放到句末。但是，连接代词始终都不能省略。 Who won the game hasn't been announced yet. It hasn't been announced yet who won the game. 这场比赛的获胜者尚未公布。 四、连接副词引导的主语从句 用来连接主语从句的连接副词主要有：when、where、why、how等。这些连接副词在主语从句中作状语。如： When they will arrive at the station doesn't matter. 他们何时到站没有什么关系。 How the accident happened is still unknown. 这场事故是怎么发生的，还不清楚。 Why he was absent from the meeting remains a mystery. 他为什么没有参加会议仍然是个谜。 Where I will spend my summer is none of your business. 我在哪里过暑假不关你的事。 为了避免头重脚轻，上面的句子可以改为： It doesn't matter when they will arrive at the station. It is still unknown how the accident happened. It remains a mystery why he was absent from the meeting. It is none of your business where I will spend my summer. 五、主语从句的注意事项 1．从句的语序 在任何情况下,主语从句都用陈述语序。 Whichever of you gets here first will get the prize. 你们谁第一个到达这里，谁就获奖。 How he succeeded is still a puzzle. 他是如何成功的仍然是个谜。 2．主谓一致 ①主句谓语用单数的情况： a.单个从句作主语时 What little she said has left us much to think about. 她说的短短几句话令我们深思。 b.两个或两个以上的连接词引导一个主语从句时 When and where the conference will be held has not been decided yet. 会议将在何时何地举行还没定下来。 ②主句谓语用复数的情况：由and连接的两个或两个以上的主语从句并列作主语时 When they will set off for London and where they will stay have not been decided yet. 他们将于何时出发去伦敦以及要住在哪里还没定下来。 ③what引导的主语从句作主语时，根据意义一致原则决定主句谓语的数。 a.若表示复数意义，则主句谓语用复数。 What he says and does do not agree. 他言行不一致。 b.若表示单数意义，则主句谓语用单数。 What he says and does does not concern me. 他的言行与我无关。 语法精练: 一、单项选择 1．（24-25高二上·广东江门·期中）_________ is important is that we let others know we care about them. A．That B．How C．What D．Where 【答案】C 【详解】考查主语从句。句意：重要的是，我们要让别人知道我们关心他们。空处引导主语从句，且从句中缺少主语，故用连接代词what，表示“……的事情”，位于句首首字母大写。故选C项。 2．（24-25高二上·广东江门·期中）_________ we will go there hasn’t been decided. A．Whether B．If C．That D．Where 【答案】A 【详解】考查主语从句。句意：我们是否要去还没有决定。引导主语从句，表示“是否”应用whether。故选A。 3．（24-25高二上·广东·期中）He failed in the exam again and __________ made matters worse was __________ he began to lose heart. A．it; that B．that; what C．what; that D．how; when 【答案】C 【详解】考查名词性从句。句意：他考试又不及格，更糟糕的是，他开始失去信心。第一个空为主语从句，从句缺少主语，指物，使用连接代词what；第二个空为表语从句，从句句意和句子结构完整，连接词为that。故选C项。 4．（24-25高二上·广东广州·期中）________ more and more people prefer to live in the countryside is not surprising. A．Why B．Whether C．That D．How 【答案】C 【详解】考查主语从句。句意：越来越多的人喜欢住在农村，这并不奇怪。引导主语从句，从句不缺少成分，句意完整，故用that引导。故选C。 5．（24-25高二上·广东广州·期中）It is raining heavily. ________ depends on the weather. A．When the Sports Meeting will be held B．When the Sports Meeting will hold C．When will the Sports Meeting be held D．When will the Sports Meeting hold 【答案】A 【详解】考查主语从句的语序和动词的时态语态。句意：天正在下大雨。运动会何时举行取决于天气。空格处是When引导的主语从句，连接词位于句首，引导主语从句，其后要用陈述语序，排除CD。主语the Sports Meeting与动词hold“举办”之间是被动关系，运动会尚未举行，因此用一般将来时态的被动语态。故选A。 6．（24-25高二上·天津南开·期中）When it comes to staring a business, really matters is a sound business plan, access to capital, and good management skills. A．that B．which C．what D．why 【答案】C 【详解】考查主语从句。句意：说到创业，真正重要的是一份合理的商业计划、获得资金的渠道和良好的管理技能。空处引导主语从句，从句缺少主语，指物，应用what引导。故选C。 7．（24-25高二上·上海嘉定·期末）It is still a mystery _____ the ancient civilization disappeared without leaving a trace. A．which B．what C．when D．how 【答案】D 【详解】考查主语从句。句意：古代文明是如何消失得无影无踪的，至今仍是个谜。It为形式主语，真正的主语是从句_____ the ancient civilization disappeared without leaving a trace，从句中不缺少成分，应用连接副词，空处意为“如何”，用how连接主语从句，故选D。 8．（24-25高二上·广东清远·期中）________ was to return to school. A．That really interested him B．What really interested him C．Which really interested him D．That interest him really 【答案】B 【详解】考查主语从句。句意：真正让他感兴趣的是回到学校。空处需填入主语从句，根据空后was可知，句子描述过去发生的事情，时态为一般过去时，从句谓语动词interest“使感兴趣”应用过去式形式，从句中缺少主语，表示“……的事物”应使用what引导主语从句。that引导名词性从句时，只起连接作用、无实意。故选B。 9．（24-25高二上·广东清远·期中）He excitedly pulled hard at it, and ________ he saw made him shout, “Wow! A big, shiny gold chain!” A．who B．what C．which D．that 【答案】B 【详解】考查主语从句。句意：他兴奋地使劲拉，看到的东西让他大叫：“哇！一条闪闪发光的大金链！”空处引导名词性从句作主语，主语从句中saw缺少宾语，结合“A big, shiny gold chain!”可知，宾语指物，应用连接代词what作引导词。故选B。 10．（24-25高二上·天津蓟州·期中）It astonished me most ______ Alice had said in the meeting last night. A．that B．what C．when D．where 【答案】B 【详解】考查主语从句。句意：爱丽丝昨晚在会上说的话最使我吃惊。本句中it作形式主语，空处引导主语从句，从句中缺少宾语，用what引导。故选B项。 11．（24-25高二上·广东深圳·期中）It is often the case __________ great opportunities come to those who are well prepared. A．why B．what C．as D．that 【答案】D 【详解】考查固定句型和名词性从句。句意：通常情况是这样的，伟大的机会总是留给有准备的人。“It is often the case that...”是固定句型，意为“通常的情况是……”，其中it是形式主语，that引导主语从句，连词that在从句中只起连接作用，无实义。故选D项。 12．（24-25高二上·广东江门·阶段练习）________governments have addressed the problem of affordable housing reflects their commitment to providing accessible living options for all citizens. A．What B．That C．There D．Whether 【答案】B 【详解】考查主语从句。句意：政府已经解决了经济适用房问题，这反映了他们为所有公民提供无障碍生活选择的承诺。A. What什么；B. That那个；C. There那里；D. Whether是否。本句为主语从句，空处只起连接作用，本身无词义，在从句中不作任何成分。故选B项。 13．（24-25高二上·天津北辰·阶段练习）Inspiring others to believe in themselves, Stephen Curry is living proof that ________ other people think of you does not have to influence what you become. A．how B．what C．which D．where 【答案】B 【详解】考查主语从句。句意：Stephen Curry激励着别人相信自己，他是一个活生生的例子，证明了别人对你的看法并不一定会影响你成为什么样的人。空处引导主语从句，引导词在从家中作宾语，指物，使用连接代词what引导，故选B。 14．（2024·天津·模拟预测）It remains to be seen ________ the new traffic regulations will adapt to the actual situation after they are issued. A．which B．whether C．what D．that 【答案】B 【详解】考查主语从句。句意：新的交通法规发布后能否适应实际情况尚待观察。分析句子结构可知，It为形式主语，空处引导主语从句作真正的主语，根据句意和句子结构可知，从句不缺成分，需填入表示“是否”的连接词。故选B项。 15．（23-24高二下·天津河东·期中）______ came late yesterday was unknown. A．Whomever B．Who C．No matter who D．Whom 【答案】B 【详解】考查主语从句。句意：昨天谁来晚了还不知道。设空处连接主语从句，从句中缺少主语，表示谁，用who引导，C选项引导让步状语从句，A和D作宾语，故选B。 16．（24-25高二下·天津滨海新·阶段练习）It is not immediately clear ________ the financial crisis will soon be over. A．that B．what C．which D．whether 【答案】D 【详解】考查连词。句意：目前还不清楚金融危机是否会很快结束。句中的it是形式主语，空格后的部分是主语从句，空格处引导主语从句，且意义为“是否”，所以应该用连词whether。故选D项。 17．（24-25高二下·广东深圳·开学考试）______ we understand things has a lot to do with what we feel. A．What B．Why C．Whether D．How 【答案】D 【详解】考查主语从句。句意：我们如何理解事情与我们所感受的有很大关系。根据句意可知，主语从句缺少方式状语，因此选择how。故选B。 18．（24-25高二下·广东深圳·开学考试）Asian elephants are among the most highly protected animals in China and _____ drove the elephants to make their long trip is still not completely certain. A．that B．which C．who D．what 【答案】D 【详解】考查主语从句。句意：亚洲象是中国最受保护的动物之一，是什么驱使大象进行长途旅行仍然不完全确定。由句意及空后的drove the elephants to make their long trip is still not completely certain可知此处应填主语从句的引导词，从句缺少主语，意为“……的事情；什么”，应用连接代词what。故选D项。 19．（24-25高二下·广东深圳·开学考试）It is uncertain _____ the rise is caused by more time spent on screens or less time outdoors, but previous studies have suggested daylight exposure is the key. A．how B．where C．what D．whether 【答案】D 【详解】考查主语从句。句意：目前还不确定这一上升是由于看屏幕时间的增加还是户外时间的减少，但之前的研究表明，日光照射是关键。由句意及空前的It is uncertain以及空后的the rise is caused by more time spent on screens or less time outdoors可知此处应填主语从句的引导词whether，whether...or...(是……还是……），it作形式主语，whether从句作真正的主语，故选D项。 20．（24-25高二上·吉林长春·期末）______ house was broken into last night is still unknown. A．Who B．Whom C．Whose D．What 【答案】C 【详解】考查名词性从句。句意：昨晚谁的房子被闯入还是未知的。空处引导主语从句，根据句意“谁的房子”可知，空处作定语，修饰名词house，含义为“谁的”，应为连接代词whose。故选C。 二、语法填空 1．（24-25高二下·海南海口·开学考试） we need more food depends on how many people turn up. (用适当的词填空) 【答案】Whether 【详解】考查主语从句。句意：我们是否需要更多的食物取决于有多少人来。_____ we need more food在句中作主语，所以空处引导主语从句。结合depends可知，这里表示我们是否需要更多的食物，表示“是否”且在句首引导主语从句，应用whether。首字母大写，故填Whether。 2．（24-25高二下·广东东莞·阶段练习）In fact, we should do is take measures to learn English well. (用适当的词填空) 【答案】what 【详解】考查主语从句。句意：事实上，我们应该做的是采取措施学好英语。此处需要使用连词引导主语从句，连词在从句中充当“do”的宾语，指事或物，因此需使用连接词what。故填what。 3．（24-25高二上·福建福州·期末）There is no escape from the long arm of the law. breaks the law will sooner or later be caught and will be punished. （用适当的词填空） 【答案】Whoever 【详解】考查连接大词。句意：法律的长臂无处不在。任何违法的人迟早会被抓住并受到惩罚。空处引导主语从句，表示 “无论谁”，用whoever引导主语从句，首字母大写。故填Whoever。 4．（24-25高二下·江苏盐城·阶段练习） he will come or not is still unknown. （用适当的词填空） 【答案】Whether 【详解】考查主语从句。句意：他来不来还不知道。结合句意及or可知，此处是whether引导主语从句，whether...or“是……还是……”，首字母应大写，故填Whether。 5．（2025高三·全国·专题练习）For students, benefits most to their learning is reading English books. (用适当的词填空) 【答案】what 【详解】考查主语从句。句意：对于学生来说，最有益于他们学习的是阅读英文书籍。设空处引导的是主语从句，引导词在从句中作主语，指代“最有益于学生学习的事情”用what。故填what。 6．（2025高三·全国·专题练习） people forget is that the Italians, when they came to Australia, brought 2, 000 years of their culture, the Greeks some 3, 000 years, and the Chinese more still. (用适当的词填空) 【答案】What 【详解】考查连接代词。句意：人们忘记的是，当意大利人来到澳大利亚时，他们带来了2000年的文化，希腊人带来了大约3000年的文化，中国人带来的文化更多。 people forget是主语从句，从句中缺少宾语，且意义为“……的事物”，应该用连接代词what引导从句。故填What。 7．（24-25高二下·全国·课后作业）It is believed the divisions between races will disappear some day. (用适当的词填空) 【答案】that 【详解】考查主语从句引导词。句意：人们相信，种族之间的分歧总有一天会消失。分析句子可知，“It”为形式主语，真正主语为“  ______ the divisions between races will disappear some day”，即，主语从句，从句结构和句意完整，应是用“that”作引导词。故填that。 8．（24-25高一下·全国·课后作业） matters is not just the outside of a string of symbols, but the inside too, not just how they are arranged but they mean. (用适当的词填空) 【答案】 What what 【详解】考查名词性从句。句意：文字的意义不只是一串符号的表面，而是其内涵，不只是它们的排列方式，而是它们所表达的意义。本句为包含主语从句和宾语从句的复合句，第一个空白处引导主语从句，因第一个空白处在主语从句中做主语表示内容，使用连接代词what引导从句。第二个空白处引导宾语从句，在从句中作宾语表示内容，使用连接代词what引导从句，故填What；what。 9．（24-25高一下·全国·课后作业） breaks the law should be punished. (用适当的词填空) 【答案】Whoever 【详解】考查主语从句。句意：任何触犯法律的人都应该受到惩罚。分析句子可知，设空处引导主语从句，结合句意可知，应为连接代词Whoever表示“无论谁；任何人”，在从句中作主语成分。故填Whoever。 10．（24-25高二下·全国·课后作业）It is unknown he has agreed to my plan. (用适当的词填空) 【答案】whether/if 【详解】考查连接词。句意：他是否同意我的计划还不知道。空处引导主语从句，从句不缺成分，根据句意可知，空处表示 “是否”连接词为whether/if，引导主语从句。故填whether/if。 11．（24-25高二下·全国·课后作业）It’s true inner beauty is very important, but external beauty shouldn’t be completely overlooked. (用适当的词填空) 【答案】that 【详解】考查连接词。句意：内在美确实很重要，但外在美也不应该被完全忽视。it为形式主语，空处引导主语从句，从句句意和句子结构完整，连接词为that。故填that。 12．（24-25高二下·全国·课后作业）It is not clear he got here without any money. (用适当的词填空) 【答案】how 【详解】考查主语从句。句意：不清楚他是如何身无分文地来到这里的。此处为主语从句的引导词，由句意及空前的It is not clear及空后的he got here without any money可知应填引导词how，意为“如何”，故填how。 13．（24-25高二下·全国·课后作业）It is still unknown the medicine will be effective to human beings. (用适当的词填空) 【答案】whether 【详解】考查主语从句。句意：这种药对人体是否有效还不得而知。由句意此处表示“是否”且引导主语从句，应用引导词whether，It作形式主语，whether引导的从句作真正的主语。故填whether。 14．（24-25高二下·全国·课后作业） he turned down the invitation was not clear. (用适当的词填空) 【答案】Why 【详解】考查主语从句。句意：他为什么拒绝邀请尚不清楚。空处引导主语从句，结合“was not clear”可推知，空处需表达“为什么，为何”，应用连接副词why作引导词，在从句中作原因状语，句首单词的首字母需大写。故填Why。 15．（24-25高二下·全国·课后作业） charity they will go to has not been decided. (用适当的词填空) 【答案】Which 【详解】考查主语从句连接词。句意：他们将去哪个慈善机构尚未决定。______charity they will go to是主语从句，从句缺少“哪个”之意，应用which引导，句首单词首字母大写，故填Which。 16．（24-25高二下·全国·课后作业） does wrong to his country or to the people deserves punishment. (用适当的词填空) 【答案】Whoever 【详解】考查主语从句。句意：凡是对国家或人民做错事的人，都应受到惩罚。此处引导主语从句，从句缺少主语，指人，表示“无论谁”，应用whoever引导，句首单词首字母大写，故填Whoever。 17．（24-25高二下·全国·课后作业）It makes no difference to me you like it or not. (用适当的词填空) 【答案】whether 【详解】考查主语从句。句意：你喜不喜欢对我来说都无所谓。It是形式主语，空处引导一个主语从句，作真正的主语，表示“是否”，且后有or not，所以使用whether引导，whether...or not是固定搭配，意为“是否”。故填whether。 18．（24-25高二下·全国·课后作业）It really bothered me he’d forgotten my birthday. （用适当的词填空） 【答案】that 【详解】考查主语从句。句意：他忘记了我的生日，这让我很烦恼。句中It是形式主语，真正的主语是后面的从句，从句句意完整，成分齐全，应用连词that引导从句，故填that。 19．（24-25高二下·全国·课后作业） the earth goes around the sun is known to us all. (用适当的词填空) 【答案】That 【详解】考查主语从句。句意：我们都知道地球绕着太阳转。此处为主语从句的引导词，空后的句子the earth goes around the sun结构完整，应用引导词that，空处位于句首，首字母需大写。故填That。 20．（24-25高一上·上海·期末）It is estimated in the UK alone, people eat three million takeaway meals a day, and the three biggest delivery apps together offer a choice of 100 cuisines from 60, 000 restaurants. (用适当的词填空) 【答案】that 【详解】考查主语从句。句意：据估计，仅在英国，人们每天就要吃300万份外卖餐，三大外卖应用一共提供了来自6万家餐厅的100种美食选择。句型It is estimated that...，表示“据估计”，that引导主语从句。故填that。 / 学科网（北京）股份有限公司 $$