What is the difference between "をいかがですか" and "はいかがですか"?


I saw both are in use. What's the different here?

Based on knownledge from primary textbooks, "は" seems better.




～をいかがですか is occasionally used, but it is much less common (only one hit on
BCCWJ as compared to >500 hits of はいかがですか), and some people may say it's
unnatural or incorrect. I don't see any semantic difference.

Note that they are interchangeable only when it means "how about (having) ～"
(e.g., コーヒーを/はいかがですか). You cannot use を when it means "how is ～ like" (e.g.,
体調はいかがですか) or "why don't you ～" (e.g., 訪問されてはいかがですか).




～をいかがですか is occasionally used, but it is much less common (only one hit on
BCCWJ as compared to >500 hits of はいかがですか), and some people may say it's
unnatural or incorrect. I don't see any semantic difference.

Note that they are interchangeable only when it means "how about (having) ～"
(e.g., コーヒーを/はいかがですか). You cannot use を when it means "how is ～ like" (e.g.,
体調はいかがですか) or "why don't you ～" (e.g., 訪問されてはいかがですか).

