From Longman Dictionary of Contemporary Englishought toought to /ˈɔːt tuː $ ˈɒːt-/ ●●●S1W1 modal verb 🔊 🔊 1SHOULD/OUGHT TOused to say that someone should do something because it is the best or most sensible thing to do syn should 🔊 You really ought to quit smoking. 🔊 The company ought to be making changes in its marketing strategy. 🔊 What sort of crimes ought the police to concentrate on? 🔊 You were out enjoying yourself when you ought to have been studying.2used to make a suggestion about something you think is a good idea, especially in a social situation syn should 🔊 We ought to get together some time soon. 🔊 You ought to meet him; he’s really nice. 🔊 We ought to get her some flowers for her birthday. 🔊 I ought to call Brian.3SHOULD/OUGHT TOused to say that someone should do something or something should happen, because it is morally right or fair syn should 🔊 You ought to be ashamed of yourself. 🔊 The courts ought to treat black and white defendants in exactly the same way. 🔊 Many people felt that America ought not to take part in the war.4PROBABLYused to say that you think something will probably happen, is probably true etc syn should 🔊 He left two hours ago, so he ought to be there by now. 🔊 They ought to win – they’ve trained hard enough. 🔊 That ought to be enough potatoes for eight people. 🔊 New technology ought to make this easier.GRAMMAR: Patterns with ought to• You say that someone ought to do something: You ought to explain.• You say that someone ought to have done something: You ought to have explained (=but you did not).• You say that someone ought not to do something: She ought not to go.• You say that someone ought not to have done something: She ought not to have gone (=but she did go).• You can also use oughtn’t: She oughtn’t to go.She oughtn’t to have gone.• You ask ought someone to do something: Ought we to tell them?• You ask ought someone to have done something: Ought we to have told them?