connective N3 common casualpolitewritten
〜のに — for (the purpose of) doing ~
〜のに ・ のに
Builds on の
Meaning
- (in order) to ~ / for ~ing — frames an action as the purpose against which a cost, tool, or suitability is measured
Key sentence
駅まで歩くのに、三十分かかる。
It takes thirty minutes to walk to the station.
Formation
| Attaches to | Form | Example |
|---|---|---|
| Verb (dictionary form) + のに, followed by かかる／要る／使う／便利だ etc. | V(る) + のに + [cost / tool / suitability] | 作るのに / 覚えるのに |
Examples
この辞書は漢字を調べるのに便利だ。
This dictionary is handy for looking up kanji.
資料を集めるのに、一週間もかかった。
It took a whole week to gather the materials.
Easily confused with
ために ために states a goal one acts toward ('I study to pass'); this のに frames the action as the *yardstick* for a cost or usefulness — it pairs with かかる, 要る, 便利だ, not with willed effort. 'X takes 30 min のに' ✓, 'I went のに' ✗. のに (although) Same surface, different grammar: concessive のに attaches to a *full clause* and means 'although' (高いのに買った); this purpose のに attaches to a dictionary-form verb and pairs with a cost/suitability word.
Notes
- Built from the nominalizer の + に. Only the dictionary form fits before this のに; a past or です/ます form signals the 'although' のに instead.
See 〜のに in real sentences
Jengo shows 〜のに the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.
Study it in JengoSources Compiled with reference to A Dictionary of Basic Japanese Grammar.