でも

With a question word, でも generally means "any-/every-" in affirmative statements: だれでも = "anybody/everybody". Compare 疑問詞ぎもんし + も + negative = "nobody/nothing" (だれも…ない). Negative sentences with でも are also possible, but their meaning is different (e.g., だれでもできるわけではない = "Not everyone can do it"). Put particles such as に, と, で, から before でも (どこにでも, だれとでも), but drop が and を (だれでも, 何なんでも).

With a noun, でも gives an extreme example ("even a child can") or a soft suggestion (お茶ちゃでも = "tea or something"). For suggestions it is common in invitations like 〜でも飲のみませんか. It differs from でも meaning "but" at the start of a sentence.