名词性从句学案 2024届高考英语一轮复习

名词性从句学案 所谓名词性从句即是因为该从句具有名词的性质与功能,故以名词性从句来命名。四类从句判定的依据主要根据从句所处的位置关系来进行。 名词性从句一共分为四类:主语从句、宾语从句、表语从句、同位语从句。 二、 引导名词性从句的引导词 我们可以把名词性从句的引导词归为三类: 从属连词 只起连接作用,不充当从句中的任何作用。 that, whether, if, as if/as though(只用于表词从句) 连接代词 既起连接作用,本身又做从句的主语、宾语、表语或定语。 who, whom, whose, what, which whoever, whomever, whatever , whichever 连接副词 既起连接作用,本身又做从句的状语。 when, where, why, how, whenever , wherever, however , how soon/often/long 主语从句就是指在主句中充当句子主语的从句。 例如: 1、连接词that, whether 引导 ① _ he is still alive is a wonder. ② _ suddenly occurred to him _ he had left his key in the office. ③ It’s no longer a question now_ man can land on the moon. ④ It was said _only three people in the world could understand Einstein’s theory at that time. ⑤ The earth became so violent that it was not clear _the shape would last or not. 【注意】 if 不能引导位于句首的主语从句,但是it作形式主语而后置的主语从句可用if来引导。 ①Whether it is going to clear up keeps me wondering.(只能用whether) 我很纳闷天空是否会放晴。 ②It is not clear to me whether/if she likes the present.(whether和if均可) 我不清楚她是否喜欢那个礼物。 2、连接代词引导 ① _broke the glass yesterday is not clear. ② _comes is welcome. ③ _of you comes in first will receive a prize. ④ _it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. 3、连接副词引导 ① _we arrive doesn’t matter. ② _the dinosaurs disappeared suddenly still remains a puzzle. 【考点一】it作形式主语 为避免头重脚轻,使句子平衡,在主语从句中常常可以使用it作形式主语,而把真正的主语(一个主语从句)放置到后面去。例如: (1) It +be+名词( a pity, a shame, a duty, a fact, an honor, a pleasure )+从句 It’s a shame that she didn’t come with us. It’s such a pleasure that you are here. (2) It +be+形容词 (clear, obvious, true, possible, important, necessary, strange)+从句 It is strange that he should not attend the meeting. It is important that he speak English every day. (3) It +be +过去分词(said/ reported / thought /hoped/believed/known)+ that从句 It is said that he is the best student in the class. It is thought that Joe drives badly. (4) It + seem, appear, happen等不及物动词+ that从句。 It seems that Alice is not comin