Presume vs Suppose

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

Presume

Top 3,000 (common) C1 verb

Suppose

Top 1,000 (very common) A2 verb

Most common: Suppose

	Presume	Suppose
Pronunciation	🇬🇧 /["/prɪˈzjuːm/","/prɪˈzjuːmz/","/prɪˈzjuːmd/","/prɪˈzjuːmɪŋ/"]/ 🇺🇸 /["/prɪˈzuːm/","/prɪˈzuːmz/","/prɪˈzuːmd/","/prɪˈzuːmɪŋ/"]/	🇬🇧 /["/səˈpəʊz/","/səˈpəʊzɪz/","/səˈpəʊzd/","/səˈpəʊzɪŋ/"]/ 🇺🇸 /["/səˈpəʊz/","/səˈpəʊzɪz/","/səˈpəʊzd/","/səˈpəʊzɪŋ/"]/
Meaning	To think something is true without proof.	to think something is true, especially for planning.
Example	I presume you have already completed the assignment.	Suppose we leave early, we might avoid traffic.
Register	Neutral	Neutral
How common	Top 3,000 (common)	Top 1,000 (very common)
CEFR level	C1	A2
Part of speech	verb	verb
Collocations	correctly, wrongly, reasonably, be presumed dead, be presumed guilty, be presumed innocent, correctly, wrongly, reasonably, be presumed dead, be presumed guilty, be presumed innocent	mistakenly, wrongly, commonly, be plausible to, be reasonable to, be absurd to, reason to suppose something
Antonyms	doubt, disbelieve, reject	disbelieve, doubt, reject
Common mistakes	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 notes	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.

See it in real clips

Breaking Bad › S1 E3

I suppose it would.

Now, suppose we take these facts one at a time.

Breaking Bad › S1 E2

I don't suppose you could buy two bins?

Breaking Bad › S1 E3

I suppose it would.

Now, suppose we take these facts one at a time.

Suppose

Frequently asked questions: Presume vs Suppose

What's the difference between Presume and Suppose?

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

Which is more common: Presume and Suppose?

Suppose is the most common in everyday English.

Which is more advanced: Presume and Suppose?

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

Are Presume and Suppose the same CEFR level?

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

What part of speech are Presume and Suppose?

Presume: verb, Suppose: verb.

Can you show an example of each?

Presume: I presume you have already completed the assignment. Suppose: Suppose we leave early, we might avoid traffic.

Can I use Presume and Suppose interchangeably?

Not always. 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.