2025年广东高考英语二轮复习：名词性从句知识点归纳素材

2025年广东高考英语名词性从句知识点归纳 在复合句中，起名词作用的从句叫作名词性从句。 （1）引导词 从属连词：指起连接作用，不充当从句中的任何成分，that, whether, if 连接代词：既起连接作用，本身又作从句的主语、宾语、表语或定语，who, whom, whose, which, what, whoever, whatever, whichever 连接副词：既起连接作用，本身又作从句的状语，when, where, how, why，whenever，wherever，however （2）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。 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： ①It+系动词+形容词+that从句。 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。 例：It is necessary that a college student (should) master one or two foreign languages. It is strange that you (should) trust Jane. ②It+系动词+名词+that从句。 It is a pity that you didn’t attend the lecture yesterday. It is no wonder that you’ve achieved so much success. ③It+ be+过去分词+that从句。 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。 例：It is suggested that you(should) spend more time in studying English. ④It+动词（+宾语或状语）+that从句。 It happened to me that I was away when he called. It occurred to me that we should get in touch with the manager. whether/if引导的主语从句 whether引导的主语从句即可以放在句首，也可以放在句末，但if引导的主语从句只能放在句末，前面需用it作形式主语。whether， if只起连句中不作成分，且不可省略。 Whether you can succeed or not depends on how hard you work at it. （whether引导的主语从句放在句首） It is unknown whether/if he has agreed to my plan. （主语从句是whether/if he has agreed to my plan, it作形式主语） 连接代词或连接副词引导的主语从句 1）连接代词what, who, whom, , whose, which , whatever, whoever, whichever等在从句中作主语、宾语、表语、定语,不可以省略。 What he said just now is true. Who breaks the law will be punished. 注：①whoever和whatever引导的名词性从句一般不用it作形式主语。 ②what 引导的主语从句一般按单数对待，但在实际使用中，其单复数取决于其成分的含义。 例：What the kid wanted was only a new school bag.（schoolbag是可数名词单数，谓语动词用单数） What they need are a car and some water.（a car and some water表示复数概念，谓语动词用复数） 2）连接副词when, where, why, how，whenever，however，wherever等在从句中作状语。 Why they suddenly disappeared remains a mystery. （why在从句中作原因状语） When we’ll go for a picnic isn’t known. （when在从句中作时间状语） （3）宾语从句 句法功能 1)作动词的宾语 ①大多数位于及物动词后。 I h ... ...