It is a pity that he did not come.是主语从句,感觉理解为同位语从句 也说得通啊

It is a pity that he could not come .这句话是主语从句吗?请分析一下句子成分, it is a fact that 这个句型到底是同位语从句还是主语从句? 为什么Whether he will come is not clear.这个句子是一个同位语从句啊. 主语从句与同位语从句的区别 It is a fact that she has done her best.是主语从句还 It's a question how he dId it.how引导的是主语从句、能不能解释一下不是同位语的原因? 1.It is a pity that he could not come.2.There is a bus that The question is whether he will come为什么是同位语从句?不是表语从句吗? it is a pity that从句虚不虚拟 it is high time that...是什么从句? it is a pity that...是什么从句? pity后的从句可以是同位语从句吗? that可以是同位语的连接词,也可以是主语从句的关系代词. 主语从句的题,15._____ is a pity that he should feel so upset.DA.Wh