Relier Pairs Modal Verbs + Have + Past ParticiplesVersion en ligne Match the modal verbs with their corresponding past participles to form correct sentences. par Marcella Endrigo 1 could have 2 shouldn't have 3 would have 4 must have 5 might or may have 6 should have 7 can't have used to express conclusions about the past used to say that sth was a good idea, but we didn't do it used to express that sth happened (or not) in the past as a result of sth else used to express what was possible in the past used to say that we had the opportunity to do sth, but we didn't used to conclude that sth was impossible in the past used to say that sth wasn't a good a idea, but we did it