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Jan 20, 2022 at 18:36 vote accept JN Raju
Jan 20, 2022 at 18:29 comment added Colin Fine No. One use of it is for (possibly realisable) conditions in the pas: They could have seen him yesterday: they didn't tell me. Another use of it is for an irrealis (or counterfactual - something that did not/is not going to happen) in any tense: I could have been rich if my company hadn't failed might be referring to a past or to a present or future possibility, but in any case the speaker knows that it can't happen.
Jan 20, 2022 at 18:19 comment added JN Raju so "could have been" used for past only, not for non-past.
Jan 20, 2022 at 17:48 comment added Colin Fine Yes, except that there are chances is not idiomatic: there is a chance that... Your second and third examples use the same tense, the non-past (often misleadingly referred to as the "present"), which was why I said it was fine with the non-past.
Jan 20, 2022 at 17:43 comment added JN Raju Is this ok, "There are chances that the bridge could be removed tomorrow by this time".
Jan 20, 2022 at 17:33 history answered Colin Fine CC BY-SA 4.0