conditional N1 uncommon writtenpolite

〜ようものなら — if

〜ようものなら

Builds on 意向形

Meaning

if one were to ~ (something drastic would follow) — raises an extreme or unlikely action and warns of the serious consequence it would trigger

Key sentence

文句もんくを言いおうものなら、ひどく怒おこられるだろう。

If I were to so much as complain, I'd be scolded terribly.

Formation

Attaches to	Form	Example
Verb volitional form	V-volitional（〜う／〜よう）+ ものなら	言いおうものなら / 遅刻ちこくしようものなら

When: Written/emphatic; the main clause is always a grave or exaggerated negative outcome — stressing how risky even attempting the action would be.

Examples

一言ひとことでも反対はんたいしようものなら、彼かれは激怒げきどする。

If you so much as voice one objection, he flies into a rage.

ミスをしようものなら、すぐにクビになる。

Were you to make a single mistake, you'd be fired on the spot.

Easily confused with

ものなら The potential-form twin: ものなら is a wistful 'if only I could ~'; ようものなら uses the volitional and warns of a dire result if the action is even attempted.

Notes

The whole point is disproportion — a small or one-off action (言いおう, 触さわろう) triggers an outsized bad consequence. The main clause never describes a good outcome.

See 〜ようものなら in real sentences

Jengo shows 〜ようものなら the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.

Study it in Jengo

Sources Compiled with reference to A Dictionary of Advanced Japanese Grammar.

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