ought to + v

• 半情态动词，表示道德义务、建议或逻辑推测，相当于“应该”“应当”“最好”。

A semi-modal verb phrase used to express moral obligation, advisable action, or logical expectation. Less direct than 'must' or 'have to', and slightly more formal than 'should'. Followed by the base form of a verb (infinitive with 'to'). Negative form: 'ought not to' or contracted 'oughtn't to'.

搭配模式ought · to · SLOT

1. Expressing moral obligation or dutyB1formal

   Used to indicate that an action is the right or ethical thing to do, based on moral principles, social norms, or personal responsibility. Softer and less authoritative than 'must', often implying a sense of what is proper rather than what is compulsory.

   表达道德义务或责任

   • You ought to apologize for what you said.
   • We ought to help those in need.
   • People ought to respect each other's opinions.
   • He ought to tell the truth, even if it's difficult.
   • They ought to recycle more to protect the environment.

2. Giving advice or recommendationsB1formal

   Used to suggest a course of action that is advisable, beneficial, or prudent. Similar to 'should' but often perceived as slightly more formal or weighty. Common in guidance, suggestions, or when expressing what would be wise to do.

   给予建议或推荐

   • You ought to see a doctor about that cough.
   • We ought to leave now to avoid the traffic.
   • She ought to practice more before the exam.
   • You ought not to skip breakfast.
   • They ought to consider all options before deciding.

3. Expressing logical expectation or probabilityB2formal

   Used to indicate that something is likely to be true or to happen based on reason, evidence, or normal circumstances. Similar to 'should' in this usage, expressing a reasonable assumption rather than certainty.

   表示逻辑上的推测或可能性

   • If he left at 8, he ought to be here by now.
   • The package ought to arrive tomorrow.
   • With all that practice, you ought to pass the test easily.
   • This recipe ought to serve four people.
   • Given her experience, she ought to get the job.