Could be vs Maybe she left it at home

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

Could be

Top 2,000 (common)

Maybe she left it at home

Top 2,000 (common)
 Could beMaybe she left it at home
Pronunciation🇬🇧 //kʊd biː//🇺🇸 //kʊd bi//🇬🇧 //ˈmeɪ.bi//🇺🇸 //ˈmeɪ.bi//
MeaningMight happen or be true.A phrase used to suggest a possibility or uncertainty about where something is.
ExampleIt could be raining later, so take an umbrella.Maybe she left it at home when she was rushing out the door.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
Collocationscould be true, could be helpful, could be dangerous, could be possiblemaybe we'll see, maybe she's right, maybe they can help, maybe it will rain, maybe you should ask
Common mistakesUsing 'could be' with certainty instead of possibility., Confusing it with 'should be' which indicates obligation., Ommiting 'could' when expressing hypothetical situations.Confused with 'may be' (two words) versus 'maybe' (one word)., Omitting 'she' and saying 'left it at home' without context., Using in the wrong tense, e.g., saying 'Maybe she leaves it at home.'
Usage notesUse 'could be' for possibilities, especially in spoken English. Avoid in very formal writing.Used to indicate uncertainty regarding a situation. Usually appropriate in everyday conversation but can be formal in some contexts.

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Could be
Maybe she left it at home

Frequently asked questions: Could be vs Maybe she left it at home

What's the difference between Could be and Maybe she left it at home?

Could be: Might happen or be true. Maybe she left it at home: A phrase used to suggest a possibility or uncertainty about where something is.

Can you show an example of each?

Could be: It could be raining later, so take an umbrella. Maybe she left it at home: Maybe she left it at home when she was rushing out the door.

Can I use Could be and Maybe she left it at home interchangeably?

Not always. Could be and Maybe she left it at home 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.

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