Which should you use, base in or base on? To base something on something means to use facts or ideas to develop it or make a decision. To base something in means to have somewhere as your main office or the main place where you work and live.
| Incorrect: |
He is based on New York.
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| Correct: |
He is based in New York.
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| Incorrect: |
The story is based in a real experience.
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| Correct: |
The story is based on a real experience.
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