/'ɔ:t tə; `ɔt tə before vowels and finally 于元音前及末尾处读作 'ɔ:t tu:; `ɔt tu/ modal v (neg 否定式 ought not to; contracted form 缩约式 oughtn't to / 5R:tnt; `Rtnt/)
1 (a) (indicating obligation 表示责任或义务)
*We ought to start at once. 我们应当马上动身.
* You ought to say you're sorry. 你应该说声对不起.
* Such things ought not to be allowed. 这类事不该容许.
* They oughtn't to let their dog run on the road. 他们不该把狗放出来满街跑.
* `Ought I to write to say thank you?' `Yes, I think you ought (to).' ｀我应该写封感谢信吗?＇｀对, 我看应该写.＇
* She ought to have been more careful. 她本该小心些. =>Usage
1 at must 见must所附用法第1项.
(b) (indicating advice or recommendation 表示劝告或推荐)
*You ought to improve your English before going to work in America. 你应该把英语学好些再去美国工作.
* There ought to be more buses during the rush hour. 高峰期间应该多开几趟公共汽车.
* You ought to see her new film. 你应当看看她新拍的电影.
* She ought to have been a teacher, ie She would probably have been a good one. 她本该当教师（很可能是个好教师）. =>Usage
2 at must 见must所附用法第2项.
2 (drawing a tentative conclusion 作推测性的结论)
*If he started at nine, he ought to be here by now. 要是他九点出发, 现在该到这儿了.
* That ought to be enough food for all of us. 那些该够我们大家吃的了.
* Look at the sky it ought to be a fine afternoon. 看看天--下午一定很晴朗. =>Usage
3 at must 见must所附用法第3项.

/'ɔ:t tə; `ɔt tə before vowels and finally 于元音前及末尾处读作 'ɔ:t tu:; `ɔt tu/
modal v (neg 否定式 ought not to; contracted form 缩约式 oughtn't to / 5R:tnt; `Rtnt/)
1 (a) (indicating obligation 表示责任或义务)
*We ought to start at once. 我们应当马上动身.
* You ought to say you're sorry. 你应该说声对不起.
* Such things ought not to be allowed. 这类事不该容许.
* They oughtn't to let their dog run on the road. 他们不该把狗放出来满街跑.
* `Ought I to write to say thank you?' `Yes, I think you ought (to).' ｀我应该写封感谢信吗?＇｀对, 我看应该写.＇
* She ought to have been more careful. 她本该小心些. =>Usage
1 at must 见must所附用法第1项.
(b) (indicating advice or recommendation 表示劝告或推荐)
*You ought to improve your English before going to work in America. 你应该把英语学好些再去美国工作.
* There ought to be more buses during the rush hour. 高峰期间应该多开几趟公共汽车.
* You ought to see her new film. 你应当看看她新拍的电影.
* She ought to have been a teacher, ie She would probably have been a good one. 她本该当教师（很可能是个好教师）. =>Usage
2 at must 见must所附用法第2项.
2 (drawing a tentative conclusion 作推测性的结论)
*If he started at nine, he ought to be here by now. 要是他九点出发, 现在该到这儿了.
* That ought to be enough food for all of us. 那些该够我们大家吃的了.
* Look at the sky it ought to be a fine afternoon. 看看天--下午一定很晴朗. =>Usage
3 at must 见 must 所附用法第3项.

modal v
[Language: Old English;Origin: ahte, past tense of agan; OWE]
used to say that someone should do something because it is the best or most sensible thing to do
= 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.
used to make a suggestion about something you think is a good idea, especially in a social situation
= 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.
used to say that someone should do something or something should happen, because it is morally right or fair
= 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.
used to say that you think something will probably happen, is probably true etc
= 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.