助詞N4
〜でも
even... / something like...
Structure
N + でも；疑問詞 + でも
Explanation
Several uses: ① attached to a noun to give an example, "something like..."; ② question word + でも expresses total affirmation, "no matter..."; ③ attached to a noun for concession, "even...". E.g., コーヒーでも飲みませんか.
Examples
日曜日でも、仕事をしなければなりません。
I have to work even on Sundays.
誰でも参加できます。
Anyone can participate.
Note
Question word + でも means total affirmation (anyone/anything); question word + も + negative means total negation (no one/nothing). Keep the difference in mind.