主语&表语&同位语从句讲义-2023届高三英语二轮复习

主语从句 1、 定义：在句子中作主语的从句叫做主语从句，按照引导词分为以下几种: 连接词 1、 that: 引导的从句一般位于句首，that在从句中不作任何成分，没有实际意义，只有连接作用。 That he will come to the party has excited every one . 有时用it作形式主语，把从句后置,常见的结构有： It’s+形容词(obvious, true, surprising, good, wonderful, possible...)+that从句 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。 It’s+名词词组(a fact, an honour, a good thing, a pity, no surprise...)+that从句 It's a pity that we can't go. 很遗憾我们不能去。 It's an honour that our team win the game. 我们赢得这场比赛真荣幸。 It’s+过去分词(said, reported, expected, decided, announced...)+that从句 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 coral reefs are being destroyed.据报道珊瑚礁正遭受破坏。 It+seems/happens等不及物动词+that从句。 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。 2、if/whether: 表示是否，在从句中不作任何成分，whether引导从句时可位于句首句末，但是if引导从句时只能用it作形式主语，从句后置。 Whether the work can be finished on time is doubtful. It is doubtful if/whether the work can be finished on time 连接代词&连接副词 连接代词what/who/which/whose/whatever/whoever/whichever等；连接副词when/where/why/how等，在从句充当一定的成分。 Who will join us has not been decided 谁将加入我们还没被决定。 What he likes most is playing computer games. 他最喜欢的是玩游戏。 When the new road is open has not been decided.新道路什么时候开通还没决定。 Whoever wants to success should work hard.无论是谁想成功必须努力工作。 表语从句 1、 定义：在句子中作表语的从句叫做主语从句，按照引导词分为以下几种: 连接词 1、that在从句中不作任何成分，只有连接作用。 The fact is that he doesn’t really try.  The trouble is that I have lost his address.  2、 whether 是否（if不能引导表语从句） The question is whether the film is worth seeing. 3、 as if/as though 好像，仿佛 It looks as if it is going to rain. 4、 because 因为 I am sleepy, and it is because I stayed up late last night. 连接代词&连接副词 连接代词what/who/whom/which/whose/whatever/whoever/whichever等；连接副词when/where/why/how等，在从句充当一定的成分。 This is what I am interested in . The doubt is who has taken away the document. That was where we camped last time. The qu