these exercises (1-3) you will practise using past modals of deduction and speculation. https://test-english.com/grammar-points/b1-b2/past-modal-verbs/ Complete the deductions for the given situations. My grandfather told me he had met Napoleon Bonaparte. He can't have . He must have . The lights were on in Kate's house and her car was there but she didn't answer the door. She might have. She can't have . I left an urgent message with my wife's secretary to phone me as soon as she arrived at the office. She hasn't phoned me. The secretary might (not) have. My wife can't have. You are the best in the class at English. On the list of exam results it says failed by your name. You don't believe it. I can't have . The teacher must have . Your friend abways phones you on your birthday. Yesterday was your birthday. She didn't phone. She can't have . She must have . Your teacher gives you a long exercise to do. After one minute you say Finished!". Your teacher says: You can't have . You must have .