Maybe vs May Be: One Word or Two?

Maybe (one word) is an adverb meaning "perhaps": Maybe it'll rain. May be (two words) is a verb phrase meaning "might be" or "could be": It may be raining. If you can replace the word with perhaps, write maybe; if you can replace it with might be, write may be.

This is one of those pairs where the spoken words are nearly identical but the grammar is completely different. Maybe sits outside the verb and comments on the whole sentence; may be is the verb. Once you look for the verb, the choice is obvious.

Quick answer: Maybe = perhaps (Maybe she's busy). May be = might be (She may be busy). Swap test: perhaps fits → maybe; might be fits → may be.

On this page

1. Two Different Jobs
2. Origins
3. The Swap Tests
4. Examples in Context
5. Formality and Style
6. Other Ways to Say "Maybe"
7. Fixed Phrases That Settle Themselves
8. A Quick Editing Exercise
9. US vs UK vs Australia
10. Common mistakes
11. A memory trick
12. Practice quiz
13. How to Decide in a Second

Two Different Jobs

Maybe: a sentence adverb

Maybe is pronounced MAY-bee, with the stress on the first syllable. It's an adverb that expresses uncertainty, usually about a whole statement. It often comes at the beginning of a clause, but it can move:

• Maybe we should leave early.
• We should maybe leave early.
• We should leave early, maybe.

Notice that each sentence still has its own verb (should leave). Maybe doesn't do the verb's work; it just adds a layer of doubt.

Maybe is also used:

• As a short answer: "Are you coming?" "Maybe."
• To soften suggestions: Maybe you could ask Sam?
• For rough estimates: There were maybe forty people there.
• As an informal noun: Put me down as a maybe.

May be: modal verb plus "be"

May be is pronounced may BEE, with a little more stress on be, though in fast speech the two sound nearly identical. It combines the modal verb may (possibility or permission) with the base verb be.

• The train may be late. (= The train might be late.)
• This may be the best pizza in Chicago.
• Visitors may be asked to show ID. (permission or possibility in the passive)

Because may be is the verb, there's usually a subject right before it: the train, this, visitors. Removing may be leaves the sentence without a verb.

Origins

Maybe is a contraction of the phrase it may be, which English speakers used to mean "perhaps." The fused form appears in Middle English, and it competed for centuries with mayhap and perchance, which have since faded into old-fashioned or humorous use. So the one-word adverb literally grew out of the two-word verb phrase, which explains why they still sound alike.

The modal may itself goes back to Old English mæg, related to words meaning "to be able" and to the noun might ("power"). That's why may and might overlap so much today.

The Swap Tests

Run one or both of these.

Test 1: Perhaps. Replace the word with perhaps. - __ we'll see you at the barbecue. → Perhaps we'll see you… (works) → maybe - It __ too cold for a barbecue. → It perhaps too cold… (fails: no verb) → may be

Test 2: Might be. Replace the word with might be. - The answer __ obvious. → The answer might be obvious. (works) → may be - __ the answer is obvious. → Might be the answer is obvious (awkward) → maybe

Notice the last row: the two example sentences mean exactly the same thing. That's useful. When you're unsure, you can often rewrite in either form.

Examples in Context

Everyday conversation

1. Maybe we should get takeaway tonight instead of cooking.
2. The beach may be crowded on a public holiday.
3. "Are you coming to the footy on Saturday?" "Maybe, if I finish my assignment."
4. That may be the ugliest jumper I've ever seen.
5. We could maybe stop in Ballarat on the way back.
6. My keys may be in the car. Can you check?
7. I've got two yeses and three maybes for the party.

Workplace and email

8. Maybe we could move the call to Wednesday afternoon?
9. There may be a short delay in processing refunds this week.
10. I may be out of the office on Friday, so please email Lisa directly.
11. Maybe it's worth asking IT before we buy new licenses.
12. Some figures in the attached draft may be out of date.
13. Applicants may be contacted for a second interview in early June.

Academic

14. These findings may be explained by differences in sample size.
15. It may be argued that the policy disproportionately affected rural communities.
16. The effect is perhaps strongest among older adults. (more formal than maybe)
17. Further work may be required to confirm the mechanism.

News style

18. Flights from Heathrow may be disrupted by strikes later this month.
19. Officials in Arizona said the fire may be contained by the weekend.
20. The minister conceded that the rollout "may be slower than hoped."
21. Residents of Townsville may be without water for up to 48 hours.
22. Analysts said there were maybe a dozen serious bidders for the club.

Informal and creative

23. Maybe, just maybe, this is the year our team wins the flag.
24. "You may be right," she said, "but I'm not admitting it."

Formality and Style

Maybe is perfectly standard English, but it carries a conversational tone. In formal writing such as essays, reports and legal documents, writers often prefer perhaps or possibly:

• Informal: Maybe the results were affected by the weather.
• Formal: The results were perhaps affected by the weather.
• Formal: The results may have been affected by the weather.

The last option, using the verb phrase, is often the neatest in academic prose.

May be has no particular formality problem. It's used everywhere, from road signs (Road may be icy) to scientific papers.

May be vs might be vs could be

All three express possibility. In everyday use they're largely interchangeable, though:

• Might is sometimes felt to suggest a slightly lower probability than may.
• Could often suggests a theoretical possibility.
• May can also express permission (You may leave), which can occasionally make a sentence ambiguous: Students may be absent on Friday could mean they're allowed to be absent or that they possibly will be. If the meaning matters, choose might for possibility or are allowed to for permission.

Other Ways to Say "Maybe"

If you're using maybe a lot, or want a different tone, these alternatives work in most places where maybe (the adverb) would fit:

Notice that might and could are verbs, so using them means restructuring the sentence. That's often the clearest fix if you're unsure which spelling to use: Maybe we'll go becomes We might go.

A note on hedging

In emails, maybe softens requests and suggestions, which is useful for politeness. But too many hedges can make you sound unsure. Compare:

• Maybe we could possibly look at moving the deadline, if that's okay?
• Could we move the deadline to Friday?

The second is still polite but far clearer. Use one hedge, not three.

"Maybe" and "may be" in the past

Past possibility changes the verb phrase but not the adverb. Maybe she was ill stays the same, while she may be ill becomes she may have been ill (or might have been). If you find yourself writing may been or maybe been, rebuild the sentence with may have been.

"Maybe" in questions and tags

Maybe also works well in short follow-up questions and tags that invite a response: Maybe next week?, Tomorrow, maybe? These fragments are fine in texts and casual emails. In each case the meaning is "perhaps," so the one-word form is right. A sign or label that omits the subject, such as Contents may be hot or May be closed on public holidays, uses the verb phrase, so it keeps two words even when may comes first.

Fixed Phrases That Settle Themselves

Several common expressions contain one form or the other, and they never switch:

• as the case may be: "We'll contact you by phone or email, as the case may be." Two words, because may be is the verb of the clause.
• be that as it may: "Be that as it may, the deadline stands." The modal and be are split up here, which shows they're separate words.
• it may be that…: a formal way to introduce a possibility: "It may be that the sensor was faulty."
• maybe so / maybe not: short replies that concede or doubt a point: "Maybe so, but I'd still check."
• a definite maybe: a playful phrase for an answer that's really undecided.

Maybe also works as a noun meaning an uncertain answer or a possibility, as in a list of yeses, nos and maybes. Its plural is maybes, never may bes.

A Quick Editing Exercise

Fix any errors in this message from a team leader in Leeds:

"There maybe a fire drill on Tuesday. May be we should move the client call to Wednesday, or maybe Thursday. The meeting room may be free then, but I'll check."

Answers: There may be a fire drill (the sentence needs a verb); Maybe we should move (means "perhaps"). The last two are already correct: or maybe Thursday means "or perhaps Thursday," and may be free is the verb phrase.

US vs UK vs Australia

There is no spelling or grammar difference between the three countries. Maybe and may be follow the same rules in American, British and Australian English, and the swap tests work everywhere.

Small differences of habit exist:

• United States: Maybe is extremely common in speech, including as a softener in requests (Maybe you could send me that file?). Americans tend to use might and may interchangeably for possibility.
• United Kingdom: British speakers use maybe freely too, alongside perhaps, which is somewhat more frequent in British English than in American English, especially in polite or formal speech. Some older British speakers also use might noticeably more than may for possibility.
• Australia: Australian usage is close to British, with maybe very common in casual speech. You'll also hear the tag maybe at the end of sentences (It's a bit far, maybe) in relaxed conversation, as in the other two varieties.

None of these preferences changes the spelling rule.

Common mistakes

❌ May be we should call a taxi. ✅ Maybe we should call a taxi. "Perhaps we should," so one word.

❌ The shop maybe closed on Sunday. ✅ The shop may be closed on Sunday. The sentence needs a verb; may be provides it.

❌ This maybe the last chance to see the exhibition. ✅ This may be the last chance to see the exhibition.

❌ I'm not sure. May be. ✅ I'm not sure. Maybe. A one-word answer.

❌ There maybe some delays on the M1. ✅ There may be some delays on the M1.

❌ It maybe true, but it's still unfair. ✅ It may be true, but it's still unfair.

The same "is it the verb or not?" check helps with setup vs set up and login vs log in, and the "adverb versus two words" pattern is identical to already vs all ready.

A memory trick

Maybe = perhaps. Both are one word. If your sentence would work with perhaps, keep it as one word.

May be = might be. Both are two words. If you can swap in might be, keep the space.

Count the words in your replacement and you'll have your answer every time. This works as well as the "for a while" trick in awhile vs a while.

Practice quiz

Choose maybe or may be.

1. ______ we can grab lunch after the meeting.
2. Tickets ______ available at the door, but don't count on it.
3. "Will you be at Jess's birthday?" "______."
4. The results ______ different if we repeat the test in summer.
5. There were ______ thirty people at the community meeting in Bendigo.
6. Your parcel ______ delivered to a neighbor if you're not home.

Answers

1. Maybe – "Perhaps we can grab lunch."
2. may be – "Tickets might be available"; it's the verb.
3. Maybe – a one-word answer meaning "perhaps."
4. may be – "The results might be different."
5. maybe – "perhaps thirty," an estimate.
6. may be – the passive verb phrase "may be delivered."

How to Decide in a Second

Look for the sentence's verb. If it already has one and you're just adding doubt, write maybe (or perhaps, if you want to sound more formal). If the word you're writing is the verb, write may be. Counting the words in perhaps versus might be is all it takes, from a quick text to a quarterly report.