Question

英语语法疑问：As the river had been risen at night made the crossin

Answer 1

我认为应该是that the river had risen at night made the crossing impossible.

或As the river had risen at night ,it made it impossible for people to cross.

前者是主语从句 后者是状语从句

原句是错句.没有the river had been risen 的说法

原句也许是As we know,that the river had risen at night made the crossing impossible.

As we know是非限制性定语从句,as是关系代词代替 后面要表达的内容.