have something done的意思是什么

造句：

1. Either in a hurry to live or in a hurry to die, people have to do something.

   要么忙着生存要么赶着去死，人总要做点什么。

2. I must do something to repay him for his help.

   我必须做点什么去报答他的帮助。

3. To live means to do something, please work hard.

   活着就意味着,要做点什么,请好好努力。