Maybe and may be look almost identical, but they do different jobs in a sentence. One is a single adverb. The other is a verb phrase. The difference becomes clear once you test what the word can be replaced with.
Maybe vs. May Be
Both forms express possibility, but they are not interchangeable.
Maybe has a near homophone in the phrase may be. Many writers get confused because both forms talk about possibility, but their grammar is different.
The Quick Test (Substitution Rule)
- Maybe (one word) = can be replaced with perhaps.
- May be (two words) = can be replaced with might be or could be.
Examples:
- Maybe it will rain. → Perhaps it will rain.
- It may be raining. → It might be raining.
Maybe: Definition and Usage
- Maybe is an adverb.
- It expresses uncertainty or possibility.
- It is a synonym of perhaps or possibly.
- It often appears at the beginning of a sentence.
Maybe examples:
- Maybe you are right and I am wrong.
- There were maybe eighty people at the event.
- We go there maybe once or twice a month.
- Maybe someday you’ll meet again.
- Maybe you’ll have better luck next time.
- Maybe he’s trying to cool off in the rain.
May Be: Definition and Usage
- May be is a verb phrase.
- It consists of the modal verb may + the verb be.
- It functions as part of the predicate.
May be examples:
- He may be late today.
- This may be the best solution.
- They may be in for bad weather.
- It may be difficult to finish on time.
- She may be working from home.
- The answer may be correct.
Side-by-Side Comparison
| Maybe | May Be |
|---|---|
| One word | Two words |
| Adverb | Verb phrase |
| Means perhaps | Means might be / could be |
| Maybe it will rain. | It may be raining. |
Position in the Sentence
- Maybe often appears at the beginning or middle of a sentence.
- May be follows the subject as part of the verb.
Compare:
- Maybe she is tired.
- She may be tired.
Simple summary:
- Maybe = perhaps (one word).
- May be = might be (two words).
When unsure, replace the phrase. One word swaps with one word. Two words swap with two words. That quick check makes the difference clear.
Last Updated on March 3, 2026
English Teacher | IELTS Instructor | English Learning Content Creator at ESLTeacher.org
Nhat Nhat is an English teacher and IELTS instructor specializing in grammar, academic writing, and English learning resources. He holds a Bachelor’s Degree in English Education from Hanoi National University of Education (HNUE), an IELTS 8.0 certificate, and TESOL / TEFL teaching certifications. With over 9 years of teaching experience, he creates practical lessons and educational content to help learners improve their English skills and exam performance.
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