Matching Pairs CAN AND MUSTOnline version REVIEW CAN MUST CAN'T AND MUSTN'T WITH IMAGES by Claire Manners 1 2 3 4 5 6 7 8 You must give your dog their own space. Dogs can't drink alcohol. Your dog can't eat the cushions. You mustn't leave a dog alone for more than 3 - 4 hours. You must feed your dog twice a day. You can teach dogs to do tricks. Dogs mustn't lick your face. Dogs can help people with mobility.