7A past modals KEY

a 2 might have broken 3 must have left 4 must have put 5 can’t have drunk
   6 might not have seen 7 must have worked 8 can’t have finished
   9 might not have been able to get / might not have got  10 must have switched off

b 2 shouldn’t have used 3 shouldn’t have broken up 4 should have come
   5 should have waited  6 should have kept 7 should have told 8 shouldn’t have worn