I'm trying to figure out what tense (or tenses) are involved when you have a participle with "to be." Examples:
Ballet is performed in the theatre. Decorum is maintained in the ballroom. English is used in the classroom.
It seems to me like present perfect continuous but I always thought those involved gerunds, not participles. Passive present perfect?
EDIT: I'm aware of that present passive is formed with -ed but was wondering if the above examples were somehow different from, say, He is intoxicated. He is intoxicated indicates his present state of being, not how he was yesterday and how he will be tomorrow. The decorum in the ballroom, on the other hand, indicates that decorum is, has been and will be maintained--that's why I wondered if these examples were some form of perfect tense.EDIT