This grammar V+든지 is commonly attached to 누구, 어디, 언제, 뭐 and 어느.
Base word | With V+든지 |
누구 (who) | 누구든지 (whoever) |
어디 (where) | 어디든지 (wherever) |
언제 (when) | 언제든지 (whenever) |
뭐 (what) | 뭐든지 (whatever) |
어느 (which) | 어느든지 (whichever) |
V+든지 can be indirectly attached to nouns, in those case it goes through N+이다 first. Note that 이 might not appear at all.