I beg to differ

US /aɪ bɛɡ tə ˈdɪfər/
UK /aɪ bɛɡ tə ˈdɪfər/
"I beg to differ" picture
1.

異議を唱えます, 同意しかねます

a polite way of saying that you do not agree with someone

:
You say it's a good idea, but I beg to differ.
それは良い考えだと言いますが、私は異議を唱えます
He claimed the report was accurate, but I beg to differ.
彼は報告書が正確だと主張しましたが、私は異議を唱えます