student asking question

Can I use "of" instead of "on" here?

teacher

Native speaker’s answer

Rebecca

No, it would sound unnatural to replace the preposition "on" with "of" here. There is not really a rule for this since English prepositions are very idiomatic. However, whenever there is research done or a study that is conducted, the preposition used to indicate the subject of the research is "on" and never "of". Ex: The professor does research on whale genetics. Ex: A five-year study was conducted on the health effects of vaping.

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