Assume vs Presume vs Suppose

When to use each in English, with meaning, register, and examples.

Assume

Top 1,000 (very common)B2verb

Presume

Top 3,000 (common)C1verb

Suppose

Top 1,000 (very common)A2verb
 AssumePresumeSuppose
Pronunciation🇬🇧 /["/əˈsjuːm/","/əˈsjuːmz/","/əˈsjuːmd/","/əˈsjuːmɪŋ/"]/🇺🇸 /["/əˈsuːm/","/əˈsuːmz/","/əˈsuːmd/","/əˈsuːmɪŋ/"]/🇬🇧 /["/prɪˈzjuːm/","/prɪˈzjuːmz/","/prɪˈzjuːmd/","/prɪˈzjuːmɪŋ/"]/🇺🇸 /["/prɪˈzuːm/","/prɪˈzuːmz/","/prɪˈzuːmd/","/prɪˈzuːmɪŋ/"]/🇬🇧 /["/səˈpəʊz/","/səˈpəʊzɪz/","/səˈpəʊzd/","/səˈpəʊzɪŋ/"]/🇺🇸 /["/səˈpəʊz/","/səˈpəʊzɪz/","/səˈpəʊzd/","/səˈpəʊzɪŋ/"]/
MeaningTo take something as true without proof.To think something is true without proof.to think something is true, especially for planning.
ExampleI assume you will be attending the meeting tomorrow.I presume you have already completed the assignment.Suppose we leave early, we might avoid traffic.
RegisterNeutralNeutralNeutral
How commonTop 1,000 (very common)Top 3,000 (common)Top 1,000 (very common)
CEFR levelB2C1A2
Part of speechverbverbverb
Collocationsautomatically, naturally, reasonably, can, might, tend to, let us assumecorrectly, wrongly, reasonably, be presumed dead, be presumed guilty, be presumed innocent, correctly, wrongly, reasonably, be presumed dead, be presumed guilty, be presumed innocentmistakenly, wrongly, commonly, be plausible to, be reasonable to, be absurd to, reason to suppose something
Antonymsdoubt, disregard, questiondoubt, disbelieve, rejectdisbelieve, doubt, reject
Common mistakesOften confused with 'presume', which implies a stronger basis for belief., Mistakenly used in place of 'guess', which is more uncertain.Confused with 'assume' — assume can imply less certainty., Using 'presume' in place of 'presumed' incorrectly., Misplacing the object; 'presume that' is more specific.Confused with 'suppose' vs 'supposed' — don't use them interchangeably., Using 'suppose' in a command form improperly., Mistakenly using 'suppose' with a noun instead of a clause.
Usage notesCommonly used in everyday conversation and writing. Avoid using 'assume' in very formal contexts where more precise language is needed.Use 'presume' when you're making a reasonable guess based on available information. Avoid in formal situations that require certainty. Suitable for casual conversations.Typically used in situations where you're making assumptions or predictions. It's less appropriate in formal writing. In casual talks, it can indicate uncertainty.

Frequently asked questions: Assume vs Presume vs Suppose

What's the difference between Assume, Presume, and Suppose?

Assume: To take something as true without proof. Presume: To think something is true without proof. Suppose: to think something is true, especially for planning.

Which is more advanced: Assume, Presume, and Suppose?

Presume is the highest level, at C1, on the CEFR scale.

Are Assume, Presume, and Suppose the same CEFR level?

Assume: B2, Presume: C1, Suppose: A2 on the CEFR scale.

What part of speech are Assume, Presume, and Suppose?

Assume: verb, Presume: verb, Suppose: verb.

Can you show an example of each?

Assume: I assume you will be attending the meeting tomorrow. Presume: I presume you have already completed the assignment. Suppose: Suppose we leave early, we might avoid traffic.

Can I use Assume, Presume, and Suppose interchangeably?

Not always. Assume, Presume, and Suppose are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.