I couldn't understand why you refused …… 啥意思知道的给说下~

I couldn't understand why you refused …… 啥意思知道的给说下~
I couldn't understand why you refused …… 啥意思
知道的给说下~

I couldn't understand why you refused …… 啥意思知道的给说下~
我不明白你为何拒绝.

我不明白你为什么要拒绝。

我不能明白你为什么拒绝

我不明白你为何拒绝了