Unit 1 Section 3 Grammar—表语从句-【赢在微点】轻松课堂2023-2024学年新教材高中英语选择性必修第二册（人教版）

Section 3　Grammar—表语从句 课前观察 自主领悟 语法图解 观察句子 ①That is why English has so many difficult rules that confuse people. ②It is interesting to learn how the words for animals and meat developed. ③It is certain that this process will continue. ④I always wondered when I would get the English novel my parents had promised to give me. ⑤What I always dreamt of has come true. ⑥It is fun wandering in the countryside. 我的领悟 1. 第①④⑤句中的黑体部分都是名词性从句,它们分别在各自的句子中作表语、宾语和主语 。 2. 第②③⑥句中的黑体部分都是it作形式主语 的用法, it分别代替的是动词不定式、主语从句 和动名词短语 。 语法课堂 高效学习 一、概念 在复合句中作表语的从句叫作表语从句。 二、引导词 引导表语从句的连接词主要有: 从属连词:that, whether, as if, as though, because (if不引导表语从句) 连接代词:who, whom, whose, which, what, whoever, whomever, whichever, whatever 连接副词:when, where, how, why 三、具体用法 1. 从属连词: (1)that 在表语从句中不充当句子成分,无实际意义,一般不能省略。如: The trouble is that I have lost his address. 麻烦的是我把他的地址弄丢了。 (2)whether在表语从句中表“是否”,但不充当句子成分。如: What the doctor really doubts is whether my mother will recover from the serious disease soon. 医生真正怀疑的是我的母亲是否能很快从重病中恢复。 (3) as/as if/as though引导的表语从句常跟在系动词后面,如seem, appear, look, taste, sound, feel等。 ①It sounds as if someone is knocking at the door. 听上去好像有人在敲门。 ②At that time, it seemed as though 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。 注意　as if/as though引导的表语从句如果是事实,就用陈述语气,如果与事实不符,就用虚拟语气(主句是一般现在时,从句就用一般过去时,be动词变成were。主句是一般过去时,从句就用过去完成时)。 ③It looks as if he were her own father. (与事实不符) 看起来好像他是她自己的父亲一样。 ④Dark clouds are gathering. It looks as if it􀆳s going to rain.(与事实相符) 乌云正在聚集。看起来好像要下雨了。 (4)because引导表语从句通常用于“This/That/It is because...”结构中,表示“这是/那是因为……”。 My anger is because you haven􀆳t written to me for a long time. 我生气是因为你很久没给我写信了。 2. 连接代词who, whom, whose, what, which, whoever, whatever, whichever引导的表语从句,除起连接作用外还在句中作主语,宾语,表语,定语,本身具有词义。 ①The problem is who we can get to replace her. 问题是我们能找到谁去替换她呢。 ②That was what she did this morning on reaching the attic. 那就是她今晨上了阁楼干的。 ③I read about it in some book or another, but what I don􀆳t know is which (book) it is. 我在某本书中读到过它,但我不知道是哪本书了。 注意　what