I wonder if this is a case of 'passivizing' while at the same time not
being a 'true passive'. There are quite a number of cases where
the object of a preposition can become a subject. Do these
passivizations merit a different name than 'passive'? Is there
some terminology to handle this? 'Oblique passive'?
Something like that?
That bed was slept in by George Washington.
This chair has been sat in once too often. (Now we'll have to fix it.)
John is usually relied on to take care of that type of problem.
CJ
PS. Sorry. Didn't see you there, Paco. We both found the typical "slept in by" example, I see.