通用高中英语语法知识点 名词性从 句

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（  ）- everwhatever = anything that 、whoever = anyone who从句中作主语、宾语、表语连接副词when、wherewhy、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 doif“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）