I never understand what you are talking about, maybe it's the language barrier.
我从不知道你在说什么,也许这就是语言障碍吧。
I'd met Stone several times before.
以前我见过世通几次。
One night, the gaoler decided to play a joke on his colleague to find out if, after so many performances, he had managed to learn the contents of the letter by heart.