This means "even if not X, at least Y." You use it when you cannot do something big (X) but you can do something small (Y).
Verb [ない-form] + までもPrimary
This means "even if not X, at least Y." You use it when you cannot do something big (X) but you can do something small (Y).
全ての作業を終えられないまでも、せめて進捗状況は報告してください。
Even if you can't finish all the work, please at least report your progress.
優勝はできなかったまでも、一回戦で負けることはなかった。
Even if I couldn't win the championship, at least I didn't lose in the first round.
毎日自炊はしないまでも、朝食くらいはちゃんと食べるようにしている。
Even if I don't cook for myself every day, I at least try to eat a proper breakfast.
問題を完全に解決しないまでも、解決への一歩となることが期待される。
Even if it does not completely solve the problem, it is expected to be a step towards a solution.
頻繁に会えないまでも、電話で声を聞くだけで嬉しい。
Even if we can't meet frequently, I'm happy just hearing your voice on the phone.
This phrase sets a basic rule. It means "at least this much." You might not reach your big goal. But you can still do a small part.
This is like 〜（は）しないまでも. But 〜ないまでも works with many verbs. 〜（は）しないまでも only uses the verb する. It is also different from 〜とは言わないまでも. That phrase is about a quality or state. This phrase is about an action.
Don't use this at the end of a sentence. For example, you cannot say "食べないまでも。"
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