不用这么死记,只要记住使役被动还原不定式就行了,忘了的时候可以凭语感
The boss made the scretary work all the time.
The scretary was made to work all the time.
感官动词不一定还原不定式,+doing也有可能
My friend saw Adams having a meal with a girl in a restaurant.
Adams was seen having a meal with a girl in a restaurant.
至于为什么,这...人为规定吧
还有问题欢迎追问!