So an impossible thought came to my mind. I'd like to know if there's any way to have an "is" in a passive tense. It's probably just a result of broken translation, but I'll try to lead you to it.
- A service "is provided" - a straight-forward passive, where the verb is in past participle
- Something "is existing" - valid language (verb in present participle), although it would be better said simply "exists"
- Something "is existed" - a grammatically correct passive (past participle), right? right?
- Something "is been" - a grammatically correct "is" passive
Now I have no idea what this would mean, because the English "is" is quite different from the Finnish equivalent which is also used to express "exists" and "has". But I could imagine it being used to convey something like "we are being", to use the "we" passive.
Still, is this valid English? I recognise this has no practical purpose, but it didn't stop me from wondering about this for hours. Languages are fun!
Sources discussing this topic in other ways: SX, Quora, although neither of them mention it being a passive.