ought to

剑桥词典

ought to modal verb (DUTY)

used to show when it is necessary or would be a good thing to perform the activity referred to by the following verb
（表示做某事有必要、值得或有利）應該，應儅
[ + infinitive ] You ought to be kinder to him. 你應該對他好一點。
We ought not/oughtn't to have agreed without knowing what it would cost . 不知道它的費用，我們本不應該同意的。
"We ought to be getting ready now." "Yes, I guess we ought (to)." “我們現在應該做好準備了。”“對，我想是的。”

例句

• If there's any doubt about the rocket's engines , we ought to cancel the launch .
• I'm surprised at you behaving so badly - you ought to know better .
• That child ought to be in bed .
• Whoever uprooted that tree ought to be ashamed of themselves.
• Men and women ought to be able to compete for jobs on an equal footing .

ought to modal verb (PROBABLE)

used to express something that you expect will happen
（表示期望某事發生）該，應該
He ought to be home by seven o'clock. 7點前他應該到家了。
They ought to have arrived at lunchtime but the flight was delayed . 他們本該在午飯時到達，可是航班延誤了。
If you show the receipt , there ought not to be any difficulty getting your money back. 如果你出示收據，退錢給你應該不成問題。

例句

• In theory , the journey ought to take three hours , but in practice it usually takes four because of roadworks .
• This sauce needs a bit of flavour - I know , some lemon juice ought to do the trick .
• Your rash ought to clear up quickly if you use this ointment regularly .
• He took his umbrella so he ought not to get wet .
• Mum ought to be home from work by now, so I'll give her a ring .
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