回复: 请教:怎样检索passive voice
Corpus method is hopeless with Chinese passive constructions, because a large quantity of them are not explicitly marked; English passive constructions can be collected based on PoS-tagged texts, but you will have to be very careful that you don't overlook get passives, passives in interrogative sentences etc.
Don't think passive construction search is easy. It is not so easy as you imagined.