1、have sth/sb do...让...去做...
I would have him wait for me at the gate of the park.
我要他在公园门口等我.
2、have sth to do 有什么事情要做.
I have a lot of homework to do tonight.
我今晚有很多功课要做.
3、have sth done有三种用法：
1）表示“主语请别人做某事”.
We had the machine repaired.
我们请人把机器修好了.
2）表示“主语遭受一种不幸”.
I had my watch stolen last night.
昨晚我的手表被偷了.
3）表示“完成某项工作”.