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高中英语主语从句用法和解释

2018年10月11日 文/李老师 浏览8834次

  在句子中起名词作用的各种从句统称为名词性从句。根据它们在句中的语法作用,这类从句又可分为主语从句、同位语从句、表语从句和宾语从句。湖南单招网为了帮助考生备战高考英语,小编整理了高中英语主语从句用法和解释,抓紧收藏哦!


1什么是主语从句

  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。


1主语从句与形式主语it

  (1) 对于以连词that引导的主语从句,通常用形式主语代主语从句:

  It’s a pity that he didn’t come. 很遗憾他没来。

  It is important that he should know about this. 他必须知道此事。

  It’s vital that we be present. 我们出席是至关重要的。

  It was intended that you be the candidate. 大家的意图是让你当候选人。

  It is important that this mission not fail. 这项使命不失败至关重要。

  It is essential that a meeting be convened this week. 本周开一次会非常重要。

  It is appropriate that this tax be abolished. 废除这个税是恰当的。

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  It’s unfair that so many people should lose their jobs. 竟有这么多人失业这是不公平的。

  It’s amazing that she should have said nothing about it. 她竟未谈及此事令人惊讶。

  It’s unthinkable that they should deny my request. 他们竟然拒绝我的请求,这是不可思议的。

  That they should refuse to sign the petition required great courage. 他们拒绝在请愿书上签字这是需要很大勇气的。

  (2) 对于以连接代词(副词)引导的主语从句,可以使用形式主语代主语从句,也可直接在句首使用主语从句:

  Whether they would support us was a problem. 他们是否会支持我们还是一个问题。

  It was a problem whether they would support us. 他们是否会支持我们还是一个问题。

  It remains to be seen whether it will do us harm or good. 它对我们是利是害,还得看看再说。


1解释

  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!

  以上《高中英语表语从句用法和解释》由湖南单招网小编整理发布,更多高职单招信息,尽在湖南单招网。

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