Based on means using something as the source or starting point. People say it about the source of a film, book or decision, and about the data a conclusion comes from. At the start of a sentence, Based on the results, ... means 'judging by the results'.
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be based on + source/facts; Based on + noun, + clause; be based in/at + place (location)
- The film is based on a true story about a teacher in a small village.
- Based on last year's numbers, we expect about two hundred people at the conference.
- Your final grade is based on three essays and one oral exam.
What changed
First versionBasing on the survey results, we decided to change the menu.
RevisionBased on the survey results, we decided to change the menu.
The -ing form looks natural here, but the verb base needs an object: we based our decision on the results. Without one, basing on doesn't work, and at the start of a sentence you need the fixed form based on. So basing was replaced with based.
Based on and according to both refer to a source, but in different ways. According to the survey means 'this is what the survey says': you pass on the source's words. Based on the survey means you draw your own conclusion from it. Based in and based at are about location: The company is based in Kazan.
Your turn
The conclusions of the study are ___ interviews with 200 teachers.
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based on — The interviews are the source the conclusions are built on, so based on. Based in tells you where something is located, and interviews aren't a place.
Write about a decision you made based on other people's experience or reviews. Say what you chose and what your choice was based on.
My choice of laptop was based on reviews from three colleagues who use the same model for design work.
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