1.have sth.done 意为:让人(给我)做某事.
如:I will have my hair cut .
我将叫人给我理发.
2.have sb.do sth.意为:让某人做某事.
如:I will have Xiao Li clean the room .
我将让小李打扫这房子.
3.have to do sth.意为:不得不做某事.
如:I have to clean the room .
我不得不打扫这房子.