高考英语二轮复习考点练习考点21主语从句、表语从句和同位语从句()

高考英语二轮复*考点练*考点21主语从句、表语从句和同位语从句(),以下展示关于高考英语二轮复*考点练*考点21主语从句、表语从句和同位语从句()的相关内容节选，更多内容请多关注我们

1、考点20 主语、表语和同位语从句高考频度：考向二 主语从句 1.主语从句在复合句中充当主语，大多数主语从句都可以用it作形式主语而把主语从句置于句尾。2.that引导主语从句时可用it作形式主语，that不可省；what引导的主语从句表示的东西时，一般不用it作形式主语；whatever，whoever，whichever一般也不用it作形式主语。That she will succeed is certain.常见的it替代that引导的主语从句的句式主要有以下几种：(1)It系动词形容词(necessary，right，likely，unlikely，wrong，important，cer。

2、tain，clear，obvious，strange，normal等)that从句It is certain that most of the farmers have brought in more money by all means.(2)Itbe名词(短语)(a pity，a shame，good news，a fact，an honour，a wonder，no wonder等)that从句Its no wonder that youve achieved so much success.(3)Itbe过去分词(said，told，heard，reported，decided，sug。

3、gested，advised，ordered，remembered，thought，considered，wellknown，announced等)that从句It is said that the professor has already succeeded in carrying out the experiment.(4)It特殊动词(seem，appear，happen，matter)that从句It happened to me that I had been away when he called.It is certain that she will succeed.注意：(1。

4、)在It is necessary/important/strange/natural.that从句结构中，从句谓语常用(should)动词原形形式。【拓展延伸】主语从句的引导词引导词作用引导词作用that无词义，在从句中不充当成分，但不能省略how多么，怎样，作方式状语或程度状语who谁，作主语、宾语when何时，作时间状语whom谁，作宾语where在哪儿，作地点状语what什么，可作主语、宾语、表语、定语why为什么，作原因状语which哪一个，哪些，作主语、宾语、定语whether是否【特别注意】当作主语的句子太长时，为保持句子平衡，常用it作形式主语，而将真正的主语置后。if是否，不。

5、可直接引导主语从句(用it作形式主语时可以) 。3. 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。

6、入WTO。4. 从句作主语时，句子谓语动词的单复数问题(1)从句作主语时，谓语动词一般用单数。That they are not going to the cinema is a big surprise to us.他们不去看电影，这使我们感到很惊讶。(2)what引导的从向作主语，谓语动词一般用单数;若从句谓语或从句后的表语是复数形式,则谓语动词常用复数。What she said is wrong.她所说的是错误的。What we need are books.我们所需要的是书籍。1.(2018天津卷单项填空)The gold medal will be awarded _to wins the first place in t。

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