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英语语法 | 主语从句

发布时间:2017-10-11 11:46:44编辑:365bet体育在线来源:www.356884.com浏览量:

 本文章由春喜在线英语2017.10.11日编辑发布

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。

 

 

说明:

 

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: It’s a pity that we can’t go. 很遗憾大家不能去。 It’s no surprise that our team should have won the game. 大家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. 大家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大家作报告是真的吗? 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

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