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南通高三寒假一对一辅导:高中英语主语从句知识点整理
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。
例如: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。
例如: 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
南通高三寒假一对一辅导哪家好? -星火教育课外补
例如:
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. 你所在的任何地方是我的家----我唯—的家。
注: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。
例如:
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。
例如:
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。
例如:
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。
例如:
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。
例如:
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。
例如:
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。
例如:How strange it is that the children are so quiet! 孩子们这么安静真奇怪!