Quick Answer: Keep means to continue doing something (keep + -ing): Keep walking. / She kept talking. Stay means to remain in a place or remain in a state: Stay calm. / Stay at home. A key rule: keep + -ing (continuous action); stay + adjective or place (unchanged state or location). For a fuller definition, see the Cambridge Dictionary entry for ‘keep’.
At a Glance: Keep vs Stay
| Word | Part of Speech | Meaning | Example |
|---|---|---|---|
| keep | verb | continue doing (keep + -ing); remain (in fixed phrases) | Keep working. / Keep quiet. |
| stay | verb | remain in a place; remain in a state (stay + adjective/location) | Stay home. / Stay calm. / Stay awake. |
Using Keep
Keep expresses the idea of continuing an action or not stopping. The most common pattern is keep + gerund (-ing):
Keep going — you're almost there!
She kept laughing all through the film.
He keeps making the same mistake.
Don't stop — just keep swimming.
Keep + Adjective (Fixed Phrases)
Keep can also be followed by an adjective in certain fixed phrases — though stay is more common in this pattern:
Keep quiet, please.
Keep still while I take the photo.
Keep calm and carry on.
Note: in most cases where both “keep” and “stay” precede an adjective, “stay” is more natural and flexible.
Using Stay
Stay means to remain — either in a place (not leave) or in a condition (not change). It is followed by an adjective (state) or a location expression:
Stay calm — everything is under control.
She stayed awake all night studying.
Stay in your seats until the bell rings.
He decided to stay at the hotel for another night.
Please stay on the path.
Stay + Adjective (State)
This is one of stay's most important uses — to describe remaining in a state or condition:
Stay positive — things will improve.
Try to stay healthy during winter.
The food stayed warm for hours.
Stay focused during the exam.
Common Mistakes
Mistake 1 — Using “stay” before a gerund (-ing) instead of “keep”
She stayed working even when she felt ill. (unnatural)
She kept working even when she felt ill.
Note: for continuing an action, use keep + -ing. Stay does not naturally combine with gerunds.
Mistake 2 — Using “keep” before a state adjective where “stay” is natural
Keep hydrated during the race. (possible but less natural)
Stay hydrated during the race.
Note: while some adjective phrases use keep (keep quiet, keep calm), stay is the natural choice for most state adjectives.
Mistake 3 — Omitting the -ing form after “keep”
Keep work hard and you will succeed.
Keep working hard and you will succeed.
Note: keep must be followed by the -ing form when expressing a continuing action. “Keep + bare infinitive” or “keep + noun” is not the same construction.
Related Confusing Word Pairs
Quick Quiz: Keep vs Stay
Choose the correct word for each sentence.
1. “___ calm — the situation is under control.”
2. “Just ___ trying — you'll get it eventually.”
3. “Please ___ in your seat until the plane has landed.”
4. “She ___ checking her phone during the meeting.” (continuous action)
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