我不知道你记不记得我?用英语怎么说?

I don't know weather/if you remember me.

I don't konw if you remembere me now!

I don't know whether you remember me.

I don't know if you have rememberd me.

辞典翻译：I don't know you to record not to remember me（比较正式）
我自己翻译I don't know if you can remember me(口语是这么说的)

I wonder wheather you still remember me