一)have sb.do sth.中的have是使役动词,可用let,make替换;do sth.为省去to的动词不定式短语,作宾语补足语。其意思和get sb.to dn sth.相近,可译为“叫(使、让、要)某人做某事”。该结构一般表示主语的意志,且强调被使役者(其人)。它没有被动形式。例如:He had Xiao Wang repair his watch.他叫小王修理了他的手表。I must have the old barber cut my hair.我得让那位老理发师给我理发。 a) have in sb.do sth. have are causative verbs that can be replaced by let and make; do sth. is a verb infinitive phrase that eliminates to, serving as an object complement. Its meaning is similar to that of get sb.to dn sth. It can be translated as “call (make, ask, ask) someone to do something”. This structure generally expresses the will of the subject, and emphasizes the enlisted person (person). It does not have a passive form. For example: He had Xiao Wang repair his watch. He called Xiao Wang to repair his watch. I must have the old barber cut my hair. I have to let the old barber cut my hair.