Like the present tense, it can refer to times in the past, present and future.
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Franky12Hi all, Can the word "could" refer to the future in this case please?A: Can it go faster? B: It could.(I see no sign to the future)There is an interpretation in which "It could" expresses past time.
Franky12why don't they simply use 'can'!?You'll have to ask them.