to do&to be done有什么区别

问题描述:

to do&to be done有什么区别
好像有什么前者是自己做,后者是叫别人做.不清楚.问下.

举个例子
i have some work to do .我有些事要做(自己做)
i have some work to be done.我有些事要做(让别人做)