～が早いか

• Reading: がはやいか
• Romaji: ga hayai ka
• Formation: Verb dictionary form + が早いか + Result clause
• Kanji breakdown: 早 = early, fast

Meaning

A conjunction meaning 'as soon as' or 'the moment that,' emphasising the immediacy with which a second action follows the first. It conveys a sense of surprise or dramatic speed at how quickly the subsequent event occurred.

が早いか stresses that the second action happens almost simultaneously with—or even before the completion of—the first. It is typically used with past-tense verbs in the main clause, and the subjects of the two clauses are often the same person. Unlike たとたん, which simply marks temporal proximity, が早いか carries a stronger nuance of unexpected swiftness and is more literary in tone. It is rarely used in casual conversation and appears most often in written narratives, news reports, and formal descriptions. The pattern cannot be used with the speaker's own volitional future actions.

Examples

1. 彼は合図を聞くが早いか、全速力で走り出した。 The moment he heard the signal, he broke into a full sprint.
2. 社長が席を立つが早いか、部下たちは一斉にざわめき始めた。 No sooner had the president stood up than the subordinates began buzzing amongst themselves.
3. 扉が開くが早いか、猫は外へ飛び出していった。 The instant the door opened, the cat dashed outside.

Usage Guide

Context: written, literary, narrative

Tone: dramatic

Do Say

• 子供は母親の姿を見つけるが早いか、駆け寄って抱きついた。
• 電車が停まるが早いか、乗客たちは我先にとホームに降りた。
• 審判が笛を吹くが早いか、選手たちはボールに飛びかかった。

Don't Say

• 明日、起きるが早いか出かけます。(Using が早いか for a planned future action — it describes spontaneous, immediate reactions) → 明日、起きたらすぐに出かけます。
• 彼女はゆっくりが早いか歩き始めた。(Pairing が早いか with a slow action contradicts the sense of immediacy) → 彼女はベルが鳴るが早いか歩き始めた。

Origin & History

が早いか literally reads 'whether it was early,' combining the subject marker が with 早い (early/fast) and the question particle か. The phrase evolved in classical Japanese to express that an action occurred so rapidly it was as if it preceded the triggering event.

Cultural Context

Generation: All ages

Social background: Universal