用left.这是have sth. done的用法.表示让某物被做.是被动用法.时间不会主动留下,所以用了被动结构.再比如：have your homework finished by yourself. have your bike repaired .
have还可以用have sb. do sth.这是使动用法.=ask sb. to do sth.用于平等地位之间的请求用法.比如：Her mother had her buy some sugar.
have还可以用have sb. doing sth.这是让某人一直做某事的意思.也可以解释为同意某人做某事的意思.比如：The boss had his guarder running for two hours.命令.
my father has me smoking at my age.同意