He had to stay in bed beause of the accident during the days------为什么用that following这个形式?画线处为什么要将这个词组改成这个形式才正确?

问题描述:

He had to stay in bed beause of the accident during the days------
为什么用that following这个形式?
画线处为什么要将这个词组改成这个形式才正确?

???没看懂

因为这起事故,在接下来的日子里他必须呆在床上.that following 是定语从句,修饰days.