
Originally Posted by
Throbert McGee
P.S. Don't forget that the past passive participle -- which is far more common in speech than the other three types of participle -- can't be formed from -ся verbs. In other words, it's not very often that you'd actually have to worry about the pronunciation of -ся in a past active participle such as занявшаяся, since you'd mainly encounter it in formal writing, not everyday conversation. In speech, short-form PPPs such as написано ("it has been written") are heard all the time, but these would never have a -ся.