までもない says an action isn't worth doing because the answer is already obvious or the matter too small: "there's no need to". It follows a verb in the dictionary form.
、。
A problem this easy isn't worth asking the teacher about.
、。
A small cut like this doesn't need a hospital.
。
It isn't worth going all that way for.
までもなく
Mid-sentence, the pattern becomes までもなく, "without even having to": the result was clear before anyone did the action.
、。
Everyone understood without needing an explanation.
、。
I knew the answer without having to look it up.
言うまでもない
The pattern you will meet most is , "it goes without saying", and its sentence opener , "needless to say".
、。
Needless to say, health matters.
。
It goes without saying that he is right.
までもない or なくてもいい
きごう〜 gives permission not to do something. までもない judges the action pointless, because the situation is already plain. That makes it a comment on the matter, not an offer, and it sits in writing and formal speech; in conversation,
きごう〜 or
きごう〜 does the everyday job.
。
You don't have to come tomorrow.
。
There's no need to ask how it turned out.
Lingaku