Grammar JLPT Level N4 - Lesson 1

でも is one of many adverbial particles in Japanese. These are particles that behave like a regular 助詞(じょし) (in that they appear after the words that they are referencing), but their role is a little bit more specific. でも itself has several uses, and the use that we will examine in this grammar point is called 例示(れいじ). Basically this means 'presenting examples'.
In English, this results in a translation similar to 'even', or 'or something'. To use this structure, simply attach でも to the end of any noun, or pronoun.

• お茶(ちゃ)でも飲(の)みましょうか。
  Shall we drink some tea, or something?
• 大丈夫(だいじょうぶ)だよ、お前(まえ)でも出来(でき)るよ。
  It's okay, even someone like you can do it.

When grouped with a standard noun as above, でも is just showing that the noun is an example/suggestion, and that there are other choices/possibilities available. However, when the noun is a word like 誰(だれ), どこ, 何(なん), or いつ, the translation becomes much closer to English words like 'anyone', 'anywhere', 'anything', or 'anytime'.

• この簡単(かんたん)な漢字(かんじ)は誰(だれ)でも分(わ)かるよ。
  Everyone knows this easy kanji.
• 「明日(あした)はどこに行(い)きたい？」「どこでもいいよ。」
  'Where do you want to go tomorrow?' 'Anywhere is fine.'
• お前(まえ)は本当(ほんとう)に何(なん)でも食(た)べるね。
  You really do eat anything.
• いつでも電話(でんわ)してね。
  Please, call me anytime.