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 would have 2 can't have 3 should have 4 could have 5 shouldn't have 6 might or may have 7 must have 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 express conclusions about the past used to say that sth wasn't a good a idea, but we did it 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