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高考英语语法考点 主语从句

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  高中英语语法 主语从句

  1. 定义:用作主语的从句叫做主语从句。

  2. 构成:关联词+简单句

  3. 引导主语从句的关联词有三类:

  (1) 从属连词that。 如:That they were in truth sisters was clear from the facial resemblance between them.

  很明显,她们确是亲姐妹,她们的脸型很相似。

  (2) 从属连词whether。如:

  Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。

  (3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever

  连接副词 where, when, how, why。如:

  What she did is not yet known. 她干了什么尚不清楚。

  How this happened is not clear to anyone. 这事怎样发生的,谁也不清楚。

  Whoever comes is welcome. 不论谁来都欢迎。

  Wherever you are is my home ---- my only home. 你所在的任何地方就是我的家----我唯一的家。

  解释:

  1. 主语从句能用it作形式上的主语。常以it作形式主语的句型有:

  A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。如:

  It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。

  It is probable that he told her everything. 很可能他把一切都告诉她了。

  B. It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。如:


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  It’s a pity that we can’t go. 很遗憾我们不能去。

  It’s no surprise that our team should have won the game. 我们没赢这场比赛真意外。

  C. It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句。如:

  It is said that Mr. Green has arrived in Beijing. 据说格林先生已经到了北京。

  It is reported that China has sent another man-made earth satellite into orbit.

  据报道中国又成功地发射了一颗人造地球卫星。

  D. It+seem, happen等不及物动词及短语+that从句。如:

  It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会。

  It happened that I was out that day. 碰巧我那天外出了。

  E. It+doesn’t matter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。如:

  It doesn’t matter whether she will come or not. 她是否来这无关紧要。

  It makes no difference where we shall have the meeting. 我们在哪里开会毫无区别。

  F. 当that引导的主语从句出现在疑问句中时,要以it作形式主语,而把主语从句后置。如:

  Is it true that the scientist will give us a lecture next week? 下周那位科学家将给我们作报告是真的吗?

  Does it matter much that they will not come tomorrow? 他们明天不来很要紧吗?

  G. 当主语从句出现在感叹句中时,要以it作形式主语,而把主语从句后置。如:

  How strange it is that the children are so quiet! 孩子们这么安静真奇怪!

  2.注意连接代词whoever, whatever, whichever等引导主语从句的含义

  Whoever comes will be welcome. (whoever=the person who) 来的人将受到欢迎。

  Whatever he did was right. (whatever=the thing that) 他所做的事情是正确的。

  Whichever of you comes in will receive a prize. (whichever=anyone of you who) 你们当中不论哪个进来将会得到奖



高考英语语法考点 主语从句
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