名词性从句名词性从句(主语、表语、宾语、同位语从句)(一)主语从句1.定义:用作主语的从句叫做主语从句
2.2.构成:关联词+简单句3.3.引导主语从句的关联词有三类:4.(1)从属连词that
如:Thattheywereintruthsisterswasclearfromthefacialresemblancebetweenthem
很明显,她们确是亲姐妹,她们的脸型很相似
(2)从属连词whether
如:Whetherhe’llcomehereisn’tclear
他是否会来这里还不清楚
(3)连接代词who,whom,whose,what,which,whoever,whatever,whichever连接副词where,when,how,why
如:Whatshedidisnotyetknown
她干了什么尚不清楚
解释:1.主语从句能用it作形式上的主语
常以it作形式主语的句型有:A
It+be+形容词(obvious,true,natural,surprising,good,wonderful,funny,possible,likely,certain,probable,etc
)+that从句
如:Itiscertainthatshewilldowellinherexam
毫无疑问她考试成绩会很好
It+be+名词词组(nowonder,anhonour,agoodthing,apity,nosurprise,etc
)+that从句
如:It’sapitythatwecan’tgo
很遗憾我们不能去
It+seem,happen等不及物动词及短语+that从句
如:ItseemsthatAliceisnotcomingtothepartyatall
Alice似乎不来参加晚会
It+doesn’tmatter(makesnodiffere