nonononono这是一个难点啊,并不是有被动语态就要用不定式
稍等在主动语态中,make,let,hear,see,watch,notice等词,其后跟省略to的动词不定式(动词原形),在变为被动语态时,必须还原动词不定式符号to.如:Weheardhimsingthissongintheroom.Hewasheardtosingthissongintheroom.Thebossmadehimwork14hoursaday.Hewasmadetowork14hoursaday.IseehimwalktoschoolHeisseentowalktoschool.