英语中include和contain区别各用在什么场合?

include 是包括的意思,用在居中,＋ing,用在句末用concluded;contain是含有的意思,整体包含部分,用在句首.
例如：My bag contains many things ,including a pen ,a pencil ,ruler and so on.
书包里装了很多东西,有钢笔,铅笔 ,还有尺子等等.