don't know why shouldn't he agree with me 从句为什么不用陈述句即why he shouldn‘t前面是I don't know。说清楚点，强调句就可以那样用吗？变为陈述句有怎样？

don't know why shouldn't he agree with me 从句为什么不用陈述句即why he shouldn‘t
前面是I don't know。
说清楚点，强调句就可以那样用吗？
变为陈述句有怎样？

I don't know why shouldn't he agree with me 句中,从句如果是陈述就应该是：I don't know why he didn't agree with me.,两句同意,但前者更注重强调“他不同意”.
即反问强调.

原句有强调意思，即为什么他竟然不同意我

这是强调句。