Believe it or not 信不信由你，你爱信不信的意思。

例句：

I’ve given up smoking, believe it or not.

我已经把烟给戒了，信不信由你。

That guy wearing the brown suit is our teacher, believe it or not.

那个穿灰色西装的人是我们班主任，信不信由你。

Believe it or not, it does work.

信不信由你，这确有作用。