suppose
High (C1 in CEFR for its full range of functions)Neutral to formal; very common in spoken and written English across registers.
Definition
Meaning
To assume something is true or real, often as a basis for reasoning or discussion.
Used to express expectation, requirement (as in 'supposed to'), to consider as a possibility, or to introduce a hypothetical situation.
Linguistics
Semantic Notes
Often functions as a discourse marker to introduce a premise or a tentative suggestion. Can imply uncertainty or hypothesis.
Dialectal Variation
British vs American Usage
Differences
Minimal. 'Suppose' and 'supposing' (as a conjunction) are equally common. The reduced form 's'pose' is more typical in informal US speech.
Connotations
In both varieties, 'I suppose' can soften a statement or express reluctant agreement, with a slightly more formal feel in American English.
Frequency
Slightly higher frequency in UK English based on corpus data, particularly in spoken language as a hedging device.
Vocabulary
Collocations
Grammar
Valency Patterns
SVO (that-clause)SVO (wh-clause)SVOC (object + to-infinitive)Imperative + that-clause (Let's suppose...)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “I suppose so (reluctant agreement)”
- “supposing (that)...”
- “as I suppose”
- “be supposed to (expected/required)”
Usage
Context Usage
Business
Used to model scenarios in planning: 'Suppose demand falls by 10%, what's our contingency?'
Academic
Introduces a hypothesis or theoretical premise: 'Suppose we accept his initial postulate...'
Everyday
Used for assumptions and polite suggestions: 'I suppose we could try the other route.'
Technical
Less common in pure technical manuals, but used in technical reasoning and logic.
Examples
By Part of Speech
verb
British English
- I suppose you'll be wanting a lift to the station?
- Let's suppose, for argument's sake, that the funding is approved.
American English
- I suppose we could grab dinner first.
- Suppose the data is flawed; what's our backup plan?
adverb
British English
- It was supposedly a secret, but everyone knew.
- He is supposedly on his way.
American English
- The document was supposedly lost in the fire.
- They're supposedly renovating the building next year.
adjective
British English
- The supposed expert knew less than the trainees.
- We met at the supposed time, but he never showed.
American English
- The supposed benefits of the plan were never realized.
- Her supposed friend was the source of the rumor.
Examples
By CEFR Level
- I suppose it's going to rain.
- You are supposed to wear a uniform.
- What do you suppose he meant by that?
- The movie is supposed to be very good.
- Suppose we don't meet the deadline; what are the consequences?
- She is generally supposed to be an authority on the subject.
- Such an outcome, one may reasonably suppose, was not anticipated by the drafters.
- The model supposes a constant rate of inflation, which is unrealistic.
Learning
Memory Aids
Mnemonic
Think of 'SUPPLY' + 'POSE'. You SUPPLY a POSE (a position/idea) to your mind as a possibility.
Conceptual Metaphor
THINKING IS SEEING ('I see what you mean') -> SUPPOSING IS PLACING AN IMAGE BEFORE ONE'S EYES.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Confusing 'suppose' (полагать, предполагать) with 'offer' (предлагать).
- Overusing 'I suppose' where a direct 'I think' is more natural.
- Mistranslating 'be supposed to' as simply 'should', losing the nuance of external expectation or rule.
Common Mistakes
- *'I am suppose to go' (missing -ed in 'supposed to').
- Using 'suppose' without 'that' where it creates ambiguity.
- Incorrect tense in hypotheticals: *'Suppose he would come...' instead of 'Suppose he came...'
Practice
Quiz
Which sentence uses 'suppose' correctly to introduce a hypothetical scenario?
FAQ
Frequently Asked Questions
'Suppose' is general for considering something as possible. 'Assume' is to accept as true without proof, often as a starting point. 'Presume' is to believe with some evidence or probability, and can imply doing so with overconfidence.
It is neutral. It's appropriate in both casual conversation ('I suppose so') and formal writing ('Let us suppose that...').
'Supposed' here is a participial adjective from the passive voice ('It is supposed by people that...'), which became a fixed phrase meaning 'expected/required' or 'said to be'.
Yes, commonly to introduce a hypothesis or suggestion: 'Suppose we leave early to avoid traffic.' It's similar to 'What if...'.