What are the equivalents for can't & must not for logical conclusions in Spanish? That is, how can I express the difference in meanings given in the following examples?
(present)
The restaurant can't be open - the door is locked
The restaurant must not be any good - it is always empty
(Past)
He had left the office at 6:00 p.m. He can't /couldn't have been at home at 6:05 p.m
She was not answering the doorbell. She must not have been at home then.
Regards,
Alexander