Modal Verbs Grammar Reference 1 Fill in the gaps with suitable modal verbs. 1 Mary has trained as a private pilot and so she can fly small planes (ability) 2 It looks like it / ../ rain. We'd better take our umbrellas. (possibility) 3 When I was little, 1...... stand on my head. (ability in the past) 4 ..... I borrow some sugar? (asking permission) 5 You ... .......... pay the rent on the first working day of each month. (obligation) 6 You see a doctor about those headaches. (advice) 7 You.......................... eat or drink in this room. (prohibition) 8 She be only 15 - she's a university student. (impossibility) 9 We have started earlier - we're running very late. (criticism for past actions) 10 1........... give you a lift, if you want. (offer)​