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 It's essential that he loses weight. 4 It's essential she exercises every day. 5 Taking vitamins isn't essential. 6 Eating too much sugar isn't allowed. She has to exercise every day. Everyone must wear a helmet. I don't have to take vitamins. You mustn't eat too much sugar. He has to lose weight. You must not run while your leg is healing.