Relacionar Columnas Modal verbsVersión en línea Small activity to practice modals for obligation por Adamaris Dominguez 1 Wearing a helmet is essential 2 Running isn't allowed until your leg is better. 3 Eating too much sugar isn't allowed. 4 It's essential that he loses weight. 5 It's essential she exercises every day. 6 Taking vitamins isn't essential. He has to lose weight. You mustn't eat too much sugar. You must not run while your leg is healing. She has to exercise every day. Everyone must wear a helmet. I don't have to take vitamins.