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高一英语听力练习:名词性从句基础

2016-07-28 12:11:00 来源:无忧考网
一、名词性从句的基本概念
  在复合句中起名词作用的从句叫名词性从句,包括作主语从句、表语从句、宾语从句和同位语从句。

  (1)主语从句

  就是在复合句中作主语的从句。主语从句常用that, whether, who, whom, whose, what, which, when, where, how, why, whatever, whoever等引导。如:

  Whether he will be able to come remains a question. 他是否来还是问题。

  That China is a great socialist country is well known. 众所周知,中国是一个伟大的社会主义国家。

  注:为避免头重脚轻,使句子平衡,常用it作形式主语,而将主语从句后置。如上述第二例常说成:

  It is well known that China is a great socialist country.

  但是,由连接代词what, whatever, whoever等引导的主语从句一般不能用形式主语。如:

  What he found surprised me greatly. 他的发现使我非常吃惊。

  Whoever is finished may rest. 凡是做完工的人都可以休息。

  (2)表语从句

  就是在连系动词之后作表语的从句。引导表语从句的连接除与引导主语从句的连接词外,还有as if, as though。如:

  The question is whether he is able to do it alone. 问题是他能否单独做这件事。

  It looks as if (though) it is going to snow. 天好像要下雪似的。

  注意:要区分以下句式:

  1. that’s why+结果;that’s because+原因。2. the reason why /for…is that…

  He is absent. That’s because he is ill. 他缺席,这是因为他生病了。

  He is ill. That’s why he is absent. 他病了,这就是他缺席的原因。

  The reason why he is absent is that he is ill. 他缺席的原因是他生病了。

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