ought
B2Neutral to Formal; common in writing and structured speech.
Definition
Meaning
A modal verb expressing moral obligation, advisability, probability, or expectation.
Used to indicate what is correct, appropriate, necessary, or desirable; also used in conditional or hypothetical statements.
Linguistics
Semantic Notes
It is a defective modal verb with no infinitive, past participle, or 3rd person singular -s form. Often carries a nuance of external expectation or logical consequence rather than personal desire.
Dialectal Variation
British vs American Usage
Differences
Usage is largely identical, though UK speakers may use it slightly more frequently. The negative contraction "oughtn't" is more common in UK English.
Connotations
Similar moral/logical weight in both varieties.
Frequency
Somewhat more frequent in UK English, but a core modal in both.
Vocabulary
Collocations
Grammar
Valency Patterns
OUGHT + to-infinitive (You ought to go).OUGHT + not + to-infinitive (You ought not to go).OUGHT + subject + to-infinitive? (Ought I to call them?)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “ought to have known better”
- “a sight for sore eyes (not directly related, but 'ought' can appear in idioms of regret: 'You ought to see it!')”
Usage
Context Usage
Business
Used to advise on recommended procedures or ethical practices (e.g., 'We ought to review the contract').
Academic
Used to express logical deduction or normative claims (e.g., 'These results ought to be reproducible').
Everyday
Giving advice or expressing expectation (e.g., 'You ought to try this cake').
Technical
Rare in highly technical manuals; more common in guidelines or safety protocols implying advisability.
Examples
By Part of Speech
verb
British English
- One ought not to queue-jump.
- He ought to have telephoned by now.
American English
- You ought to call your mother.
- They ought not to park there.
adverb
British English
- N/A
American English
- N/A
adjective
British English
- N/A
American English
- N/A
Examples
By CEFR Level
- You ought to eat your vegetables.
- We ought to be quiet in the library.
- She ought to apologise for what she said.
- This milk ought to be fresh; I bought it yesterday.
- Given the company's profits, they ought to invest in new equipment.
- The government ought to have acted sooner to avert the crisis.
- Such a profound philosophical claim ought to be substantiated with rigorous argument.
- Had the evidence been reviewed properly, the committee ought never to have reached that conclusion.
Learning
Memory Aids
Mnemonic
Think of 'OUGHT' as containing 'OUGHT' – what you OUGHT to do carries weight. Link it to 'aught' (anything), as in 'you ought to do all you can'.
Conceptual Metaphor
MORAL OBLIGATION IS A BURDEN / LOGICAL EXPECTATION IS A PATH (one ought to follow).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating directly as 'должен' in all cases, as Russian 'должен' is closer to 'must'. 'Ought' is softer, often closer to 'следует', 'стоило бы'.
- The required infinitive particle 'to' after 'ought' is a common omission error.
Common Mistakes
- *You ought go. (Missing 'to')
- *You ought to gone. (Using past participle instead of infinitive)
- Incorrect negation: *You ought don't go. (Correct: You ought not to go/You oughtn't to go.)
Practice
Quiz
Which sentence uses 'ought' correctly?
FAQ
Frequently Asked Questions
Yes, in standard modern English, 'ought' is almost always followed by a 'to'-infinitive (e.g., 'ought to go'). The form without 'to' is archaic or dialectal.
They are often interchangeable, but 'ought to' can sound slightly more objective, based on external rules or logic, whereas 'should' can be more subjective or personal. 'Ought to' is also slightly more formal.
The formal negative is 'ought not to' (e.g., 'You ought not to worry'). In informal speech, especially British English, the contraction 'oughtn't to' is used (e.g., 'You oughtn't to do that'). 'Didn't ought to' is non-standard.
'Ought' itself does not change form. To refer to the past, use 'ought to have' + past participle (e.g., 'He ought to have told me'), which often expresses a regret or criticism about something that didn't happen.