III.Underline the modals in the following sentences. ioly had left her cellphone not answer the phone. 16. She must stay in the house tonight. 17. You may watch the film with your friend, . 18. The witness should give his statement at the court. 19. I can buy you an expensive car, 20. May I ask you something? 21. I have to check the faucet if it is leaking.