08 名词性从句-2023年暑假新高一英语初高中衔接知识抢先学(通用版)

08 名词性从句 一、主语从句 主语从句是在复合句中担任主语的句子。其特点有： （1）引导词： 从属连词 that, whether； 连接代词 who, what, which； whoever, whatever, whichever; 连接副词 when, where, how和why。 （2）语序：陈述句语序 （3）在主语从句中只能用whether，不能用if That he will win the match is certain. It is certain that he will win the match. 1. 一般来说主语从句都是放在句首，但有时为了使句子保持平衡，避免"头重脚轻"，常用it作形式主语，从而把主语从句放后面。常以it作形式主语的句型有： ①It is＋形容词＋that... It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。 ②It is＋名词词组(no wonder，an honour，a good thing，a pity，no surprise，common knowledge，a surprise， a fact，etc. )＋that... It’s a pity that we can’t go. 很遗憾我们不能去。 ③It is＋过去分词(said，reported，thought，expected，decided，announced，arranged，etc. )＋that... It has been suggested that much should be done to prevent the river from being polluted. 有人建议应做更多的工作阻止河流遭受污染。 ④It appears/seems that...|It happens that...|It occurred to me that...|It turned out that... It turned out that nobody remembered the address. 结果发现没人记得这地址。 ⑤It doesn’t matter that...|It makes no difference that... It doesn’t matter whether she will come or not. 她是否来这无关紧要。 2. 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。 Does it matter much that they will not come tomorrow？ 他们明天不来很要紧吗？ 3. 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。 How strange it is that the children are so quiet！ 孩子们这么安静真奇怪！ 二、表语从句 表语从句放在连系动词之后，充当复合句中的表语。引导表语从句的关联词的种类： 1. 可接表语从句的连系动词有be，look，seem，sound，appear等。 China is no longer what she used to be. 今日的中国不再是过去的中国了。 The question remains whether they will be able to help us. 问题还是他们能否帮我们。 At that time，it seemed as if I couldn’t think of the right word. 当时，我似乎怎么也想不出一个恰当的字眼来。 2. 从属连词whether，as，as if / though引导的表语从句。 He looked just as he had looked ten years before. 他看起来还与十年前一样。 It sounds as if someone is knocking at the door. 听起来好像有人在敲门。 3. because，why引导的表语从句。 That’s because he didn’t understand me. 那是因为他没有理解我。（That’s because…强调原因） That’s why he got angry with me.