不知为什么的英文

Don't know why

I don't know why.(一般现在时）现在仍不知道I didn't know why.（一般过去时）过去不知道，现在知道

我也不知道为什么翻译成英文是：I don't know why.例句及用法：1、Whenever I speak Chinese, my colleagues laugh at me, and I don't know why.我每次说汉语的时候，同事都会笑，我也不知道为什么？2、I don't know why I let it all bother me so much.我也不知道为什么我会那么担心。3、I don't know why someone would want to tap his phone.我也不知道为什么有人会窃听他的电话。

---- I don't know why, either.

Do not know why~~~

no idea whydon't know why