Maybe so vs Perhaps vs Possibly

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

Maybe so

Top 3,000 (common)

Perhaps

Top 1,000 (very common)A2adverb

Possibly

Top 2,000 (common)B1adverb
Most common: Perhaps
 Maybe soPerhapsPossibly
Pronunciation🇬🇧 //ˈmeɪ.bi səʊ//🇺🇸 //ˈmeɪ.bi soʊ//🇬🇧 /["/pəˈhæps//præps/"]/🇺🇸 /["/pərˈhæps/"]/🇬🇧 /["/ˈpɒsəbli/"]/🇺🇸 /["/ˈpɑːsəbli/"]/
MeaningIt's possible or could be true.maybe; it might be truemaybe or maybe not; not sure
ExampleAre you coming to the party? Maybe so.‘Are you going to come?’ ‘Perhaps. I'll see how I feel.’It could possibly rain tomorrow, so take an umbrella.
RegisterNeutralNeutralNeutral
How commonTop 3,000 (common)Top 1,000 (very common)Top 2,000 (common)
CEFR level-A2B1
Part of speechadverbadverb
Collocationsmaybe so, maybe not, I think maybe so, could be, maybe soperhaps we should, perhaps it is, perhaps he thoughtpossibly true, possibly available, possibly dangerous
Antonymsdefinitely not, certainly not, no waydefinitely, certainlydefinitely, certainly
Common mistakesUsed in affirmative responses instead of uncertainty., Confused with 'maybe not' when disagreeing., Overused in situations where a clear answer is needed.'Perhaps' can't be used as a noun., Confused with 'perchance', which is more archaic., Using 'perhaps' in very direct or commanding statements.'Possibly' is often confused with 'probably'—they mean different things., Learners may omit 'possibly' in sentences where it's needed., Some learners incorrectly use 'possibly' with the gerund form (e.g., 'possibly going').
Usage notesUse 'maybe so' to express uncertainty or possibility. It's appropriate in casual conversations but might be too informal in formal discussions.Use 'perhaps' in formal writing or speech. It's less common in casual conversations, where 'maybe' is preferred. Avoid using it when being certain.Use 'possibly' when you want to express uncertainty or doubt about something. It's generally neutral, suitable for both spoken and written contexts, but avoid it in very formal writing where you might prefer words like 'potentially'.

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Maybe so
Perhaps
Possibly

Frequently asked questions: Maybe so vs Perhaps vs Possibly

What's the difference between Maybe so, Perhaps, and Possibly?

Maybe so: It's possible or could be true. Perhaps: maybe; it might be true Possibly: maybe or maybe not; not sure

Which is more common: Maybe so, Perhaps, and Possibly?

Perhaps is the most common in everyday English.

Which is more advanced: Maybe so, Perhaps, and Possibly?

Possibly is the highest level, at B1, on the CEFR scale.

Can you show an example of each?

Maybe so: Are you coming to the party? Maybe so. Perhaps: ‘Are you going to come?’ ‘Perhaps. I'll see how I feel.’ Possibly: It could possibly rain tomorrow, so take an umbrella.

Can I use Maybe so, Perhaps, and Possibly interchangeably?

Not always. Maybe so, Perhaps, and Possibly 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.