When there's no other verb which indicates the tense in a sentence like
I could eat it.
, not like
I did all I could.
, then does the could-phrase always have present or future tense?
In other words, when the "could+V" is the only verb in a sentence, can this have any meaning related to some past event?
(except the negative form or could+have+pp form or any other special(?) verbs such as "hear","smell")