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。
