have sb do 是让.....做某事 表达使和让含义的动词，不带to
have sb doing 是让.....不断做......
have sb to do 是有某人，或某事 要做
例如： I have a student to look for 我有一个学生要找
have sb done 是遭遇，或者让某人被做 done 过往分词表被动含义
例如 I have a dog looked after 我有一只狗要人照看
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me, too
have sb do 是让SB往DO
have sb doing 是让SB往不断做
have sb to do 一般用have sth to do 较多 to do 来润色sth.
have sb done 也一般用 have sth done 较多，表达STH被做
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