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通用高中英语语法知识点 名词性从 句
展开名 词 性 从 句
名词性从句包括:主语从句、宾语从句、表语从句、同位语从句。从句的语序为陈述句语序。
考点 1 主语从句引导词
连 词 | that | 无词义,不充当成分,不能省略,可以位于句首 | |
whether | “是否”,不充当成分,不能省略,可以位于句首 | ||
连接 代词 | which |
起名词性作用 充当成分 | 从句中作定语 |
what | 从句中作主语、定语、定语 | ||
who | 从句中作主语 | ||
whom | 从句中作宾语 | ||
whose | 从句中作定语 | ||
( )- ever | whatever = anything that 、whoever = anyone who 从句中作主语、宾语、表语 | ||
连接 副词 | when、where why、how | 有含义,从句中作状语 |
考点 2 it 作形式主语代替主语从句
It + be + adj.+ that ...
| It is necessary that… 有必要…… It is clear that… 很清楚…… It is likely that… 很可能…… It is important that… 重要的是…… |
It + be + 名词 + that ...
| It is a fact that… 事实是…… It is good news that… ……是好消息 It is a question that… ……是个问题 It is common knowledge that… ……是常识 |
It + be +动词的过去分词+ that ... | It is said that… 据说…… It is reported that… 据报道…… It has been proved that… 已证明…… It must be pointed out that… 必须指出…… |
It seems / seemed /happen /happened + that ... It makes no difference whether ... |
考点 3 宾语从句引导词
连 词 | that | 无词义,不充当成分,能省略 |
whether | “是否”,不充当成分,不能省略,可以位于句首 介词 + whether 、 whether ... or not 、引导同位语 、whether to do | |
if | “是否”,不充当成分 | |
连接 代词 | which 、what 、who 、whom 、whose | |
连接 副词 | when、where、why、how |
考点 4 宾语从句的时态
宾语从句的时态取决于主句的时态,但宾语从句是客观事实时,从句一律用一般现在时。
考点 5 表语从句的连系动词
am, is, are, was, were, being, been ,feel, look, sound, taste, smell,remain, keep, stay,become, get, grow, turn, turn out, go, come, run, fall,prove, seem, appear等。
考点 6 表语从句的引导词
连 词 | that | 无词义,不充当成分,不能省略 |
whether | “是否”,不充当成分,不能省略 | |
because、 as though、 as if | ||
关系代词 | which 、what 、who 、whom 、whose 、whatever、whoever、whomever、whichever | |
关系副词 | when、where、why、how、however 、whenever 、 wherever |
考点 7 That is (the reason) why…与That is because…的辨析。
That is (the reason) why… “那就是……的原因” 指由于各种原因所造成的后果 | He did not see the film last night. That is because he had to help his little sister with her homework. (第一句话说明结果,第二句话说明原因。)
|
That is because… “那是因为……” 指原因或理由 | He had seen the film before. That is why he did not see it last night. (第一句话说明原因, 第二句话说明结果。) |
考点 8 同位语从句
同位语从句对前面的名词加以补充说明,,一般由that 、whether等连词引导。放在名词后面。
The news that a president will inspect our factory is true.(同位语从句)