...expressed his concern about/with/over...?

out there


I'd like to know if I shoud say:

Situation: Ken is a student learning English as a foreign language. He is worried about his English. He thinks that his English is poor.

If I want to use 'concern' (Like,,,Ken is concerned about his English), but I want to use it with the word 'express' to emphasise that he expressed this opinion:

Should I say...?

Ken expressed his concern about/over/with his English.

Which one is better?
  • English-United States
    I would use about. To me, concerned about means, worried about. Concerned with, means this is the topic that I want to discuss/what interests me. I don't use concerned over.
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