Read the sentences. Which modals: give permission? express obligation? express lack of necessity? express prohibition? give advice? express possibility? At the sports centre... 1 You have to/must/need to wear trainers on the indoor tennis courts and football pitches. (it's necessary/it's the rule) 2 You don't have to/don't need to/needn't be a member of the sports centre to use the swimming pool. (it's not necessary) 3 Members may/can use all of the sports club's facilities. (it's allowed) 4 Children mustn't/can't use the swimming pool without being accompanied by an adult. (it's not allowed) 5 The centre might/may/could be closed to the public on competition days. (it's possible) 6 You should/ought to lock your valuables in a locker to keep them safe. (it's the best thing)