【语法】高中英语--名词性从句专题讲解(详细)

名词性从句 概念 在复合句中起名词作用的从句叫作名词性从句。 种类 主语从句、宾语从句、表语从句和同位语从句。 注：由于名词性从句在句中不同的句法功能（即名词性从句在复合句中，能充当主语、宾语、表语、同位语等。），相应地，名词性从句可以分为主语从句、宾语从句、表语从句和同位语从句。 引导词 类别 从属连词 连接代词 连接副词 功能 指起连接作用，不充当从句中的任何成分 既起连接作用，本身又作从句的主语、宾语、表语或定语 既起连接作用，本身又作从句的状语 that, whether, if who, whom, whose, which, what, whoever, whatever, whichever when, where, how, why，whenever，wherever，however 主语从句 主语从句可直接放在句首，也可用形式主语it代替，而将主语从句后置。 例词

? that引导的主语从句 1) that引导的主语从句置于句首（that此时在从句中不充当任何成分，无含义，只起连接作用，不能省略） That the earth moves around the sun is known to all. 注：从句作主语，谓语动词用单数形式。 2) 在that引导的主语从句中，常用it作形式主语，that引导的真正的主语从句后置，常见的此类句型有： ① It+系动词+形容词+that从句。 常用于这种结构的形容词有： necessary right (un)likely strange natural 必要的 正确的 （不）可能的 奇怪的 自然的 certain clear possible obvious important 明确的 清晰的 可能的 明显的 重要的 It is likely that he can’t come to the meeting. It is obvious that you have made a big mistake. 注：It is necessary/important/surprising/strange/unthinkable/unbelievable/incredible that+主语(should)+动词原形+其它。 e.g. It is necessary that a college student (should) master one or two foreign languages. It is strange that you (should) trust Jane. ② It+系动词+名词+that从句。

常用于这种结构的名词有： a pity a shame good news a fact It is a pity that you didn’t attend the lecture yesterday. It is no wonder that you’ve achieved so much success. ③ It+ be+过去分词+that从句。 常用于这种结构的过去分词有： said heard decided advised remembered considered hoped 据说 有人听说 作出决定 有人建议 有人记得 认为 有人希望 told reported suggested ordered thought well-known announced 有人告诉 据报道 有人建议 根据命令 有人认为 很著名 据宣布 遗憾 令人遗憾的事 好消息 事实 a honor a wonder no wonder no surprise 荣耀 奇迹 难怪 不奇怪 It is reported that no passengers were injured in the accident. It is generally considered that boys are better at science than girls. 注：It is suggested/advised/ordered/requested/insisted/demanded +that+主语(should)+动词原形+其它。 e.g. It is suggested that you(should) spend more time in studying English. ④ It+动词（+宾语或状语）+that从句。