must have, may/might have, can’t have — Exercise 1 PDF (with answers) Next ➔ Try this worksheet online must have, may/might have, can’t have — Exercise 1 Similar Worksheets can’t have + past participle must have, might have, can’t have, should have must have, might have, can’t have, should have — Exercise 2 Past Modals — Exercise 1 might have + past participle