～ものを (mono-wo): If only; although ... regrettably
～ものを (mono-wo)
Meaning
If only; although ... regrettably
Formation and usage
plain clause + ものを
Notation: N = noun; V dictionary = dictionary-form verb; V stem = the stem before ます; plain clause = plain-form clause; negative stem = the form before ない. Follow the attachment shown above.
Explanation
Expresses regret or reproach about an avoidable bad outcome, often in literary or emotional language.
Examples
先に資料を確認しておけばよかったものを、彼は何もしなかった。
He should have taken care of checking the documents beforehand, but he did nothing.
先に先生に相談しておけばよかったものを、彼は何もしなかった。
He should have taken care of consulting the teacher beforehand, but he did nothing.
先に計画を見直しておけばよかったものを、彼は何もしなかった。
He should have taken care of reviewing the plan beforehand, but he did nothing.
先に会場を下見しておけばよかったものを、彼は何もしなかった。
He should have taken care of inspecting the venue beforehand beforehand, but he did nothing.
先に十分に練習しておけばよかったものを、彼は何もしなかった。
He should have taken care of practicing thoroughly beforehand, but he did nothing.
How related patterns differ
ものを regrets an avoidable bad outcome. やむを得ず reluctantly accepts circumstances; だけまし finds a redeeming point. としたところで and たところで assume a case but commonly maintain a limitation in the result.