i think （）important to tell him about it答案是it 我觉得是it is 做形式主语，为什么只有it 没有is呢

显示全部楼层 · 2013-1-2 22:54:46

两个答案都可以，都对，句子结构不同，分析如下：I think it important to tell hime about it.是简单句，第一个it是形式宾语，为真正宾语。I think it is important to tell hime about it.是主从复合句，it is important to tell hime about it.是宾语从句，从句中，第一个it是形式主语，to tell hime about it.作真正主语。...

千问 · 2013-1-2 22:54:46

我觉得应该是it是形宾important做宾补不定式做真正的宾语...

千问 · 2013-1-2 22:54:46

it真正代表的是后面tell him about it，it只是形式上的宾语...

千问 · 2013-1-2 22:54:46

是it is 啊...