主语从句
高考频度：★★★★★ 难易程度：★★★★☆
1. （2017·北京卷·单项填空）Every year, ______ makes the most beautiful kite will win a prize in the Kite Festival.
A. whatever B. whoever C. whomever D. whichever 【答案】B
2.（2016·江苏卷·单项填空）It is often the case ____________ anything is possible for those who hang on to hope. A. that 【答案】D
【解析】考查主语从句。本句中it是形式主语，真正的主语是连接词that引导的主语从句，连接词that在本句中不充当任何成分，只是一个引导词而已，不能省略。连接副词why要在句中作状语，连接代词what通常在句中作主语、宾语或表语等；as通常不引导名词性从句。句意：对于那些心存希望的人一切皆可能是事实。故D正确。
【应试必备】 引导主语从句的连接词主要有三类： 连接词：that，whether 连接代词：what，who，whose，whatever，whichever，whoever等 连接副词：when，where，why，how 1. 连接词that，whether引导 That the college will take in more new students this year is true. 今年这所大学将招收更多新生是真的。
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why B. what C. as D.
Whether he can finish his task on time is of great importance. 他是否能按时完成任务非常重要。 注意： （1）if不能引导主语从句。 （2）形式主语it替代主语从句。常见的it替代主语从句的句式主要有以下几种： ① It+系动词+形容词+that从句。 It is quite clear that the whole project is doomed to failure. 很清楚，整个计划注定要失败。 It’s clear that they badly need help. 很明显，他们急需援助。 It’s possible that we can carry out the project at last. 最终我们能完成这项工程是有可能的。 ② It+系动词+名词+that从句。常用于这种句型的名词（词组）有：fact，good idea，pity，hour，shame，no wonder，good news etc. It is our hope that the two sides will work towards peace. 我们的希望是双方能朝着和平的方向发展。 ―Tom has a bad cold. 汤姆患了重感冒。 ―It is no wonder that he looks pale. 难怪他看起来脸色苍白。 It’s a pity that you missed the film. 你没有看那部电影真是太遗憾了。 ③ It+be+过去分词+that从句。过去分词表示：建议，命令，愿望如suggested，ordered， requested等词时，从句需用虚拟语气，即should ＋动词原形。 It is announced that the plan has been successfully carried out. 据宣布计划已经顺利实施。 It is well-known that the earth moves around the sun. 众所周知，地球围绕太阳转。 2. 连接代词引导 3. 连接副词引导 How acupuncture reduces and relieves pain is unclear. 针灸是如何减轻和解除疼痛的还不清楚。 - 2 -
Why dinosaurs suddenly disappeared still remains a mystery. 恐龙为什么突然消失了还是个谜。 4. 主语从句的特殊用法 （1）主语从句与定语从句的转换 What is needed has been bought. All that is needed has been bought. 所有需要的都被买了。 （2）几个特殊句型之间的转换 It is known to all that China has joined the WTO. As is known to all, China has joined the WTO. What is known to all is that China has joined the WTO. 众所周知，中国已加入WTO。
1.（2016·北京卷·单项填空）Your support is important to our work. ______________ you can do helps. A. However C. Whatever
B. Whoever D. Wherever
2. ______________ bothers me is that the young man seems to know a bit too much. A.Whether C.Which
B.What D.That
3. Top players must have excellent ball control, but it is not just ______________ they do with their feet ______________ counts. A.how；that
B.that；what D.what；that
C.whether；what
4. ______________ Tom will win the computer competition remains a secret till next Monday. A.When C.What
B.That D.Whether
5. ______________ that the Chinese government plans to end its one-child policy and
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instead let families have two children. A.It was reported C.It has reported 参考答案
1.C 【解析】考查主语从句。helps是谓语，＂______________ you can do＂是主语部分，
即主语从句，在主语从句中，do后缺少宾语，表示＂任何事情＂，因此用whatever引导，故选C。
2. B 【解析】考查主语从句。句意：让我烦的是这个年轻人知道的似乎有点太多了。根据
句意可知，此处为主语从句，连词在从句中充当主语。whether是否；which哪个；that在名词性从句中不充当句子成分。故选B。
B.What was reported D.As was reported
进步，在于总结。我在这，总结在哪儿？
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