Hi,
this is another thread to take advantage of.
I get the feeling that in passive sentences the present perfect is used even if in active sentences the past simple is the common choice (at least in AmE).
Did you hear the latest news? Someone robbed the bank!
Did you hear the latest news? The bank's been robbed! (This is the passive version but instead of saying "was robbed", which is the passive of "robbed", we say "has been robbed")
Damn! Where are my cookies? Someone ate them!
Damn! Where are my cookies? They've been eaten! (Same comment as above, "were eaten", which is the passive of "ate", is not as good as "have been eaten")
What do you think of my comments? Thanks