Matching Pairs Modal verbs. Online version Match the correct modal verb with the example. by Isabel Gallego Chaves 1 MUST - deduction 2 CAN - possibility 3 CAN - ability 4 MAY - possibility 5 MUSTN'T - prohibition 6 HAVE TO - obligation (external) 7 DON'T HAVE TO - no obligation 8 MAY - permission (formal) 9 CAN - Permission (informal) 10 MUST - obligation (personal) "May I come in?" I asked the headmaster. If your car is correctly parked, you don't have to worry. Walter can check his emails when he is cooking Can I make a phone call? Passengers have to hold their passports when passing the police control. Passengers must check that they have their luggage. Eddie's twin brother must be the one on the left because they look alike. I am busy all day but I may lend you a hand after work. You can't be on time, the bus left ten minutes ago You mustn't leave the school jumping over the fence.