我真不知道

我真不知道

I really don't know.

— 城市英雄 (1993)

我真不知道他想什么

I really don't know what he's thinking.

— 回归 (2006)

我真不知道怎麽教好他

I really don't know how to teach him well.

— 四百击 (1959)

我真不知道自己在干什么

I honestly don't know what I'm doing.

— A Sun (2019)