it is high time that we had better do homework这句话是什么从句,如何分析是原文句子，但是他是什么从句

it is high time that we had better do homework这句话是什么从句,如何分析是原文句子，但是他是什么从句
it is high time that we had better do homework
这句话是什么从句,如何分析
是原文句子，但是他是什么从句

it is high time that we had better do homework这句话是什么从句,如何分析是原文句子，但是他是什么从句
这句话有问题.
一般写
It is high time that we did homework.
就可以了.

主语从句。