き
Past (Classical)
In Classical Japanese (Kobun), き is the primary way to express the recollective past. It indicates that the speaker personally witnessed or experienced the event they are describing.
How It Works
The auxiliary verb き is a highly irregular Past Tense (過去) auxiliary verb that primarily attaches to the 連用形（れんようけい） of verbs. It is a staple of Heian-period literature like the Tale of Genji.
1. Conjugation Table:
- 未然形（みぜんけい）: せ (Used almost exclusively in the Counterfactual Past / 反実仮想（はんじつかそう） construction: せば…まし, which translates to "If [A] had happened, then [B] would have happened.")
- 連用形（れんようけい）: — (None)
- 終止形（しゅうしけい）: き (Ends a sentence)
- 連体形（れんたいけい）: し (Modifies a noun; also used with the kakari-musubi particles ぞ, なむ, や, and か)
- 已然形（いぜんけい）: しか (Frequently followed by the particles ば (しかば) to mean 'because/when', ど/ども to mean 'although/but', or used with the particle こそ)
- 命令形（めいれいけい）: — (None)
2. Semantic Distinction: Direct Experience vs. Hearsay
The most important feature of き is that it expresses Direct Personal Experience (回想・直接体験). It is used when the speaker is recalling an event they personally witnessed or participated in, or for absolute assertion. Because it expresses direct experience, it indicates that the speaker (first person) directly witnessed or experienced the event, even if the grammatical subject of the sentence is someone else (second or third person). For example, in a sentence like 「みな人、子どもなかりき」 (Everyone had no children [and I saw this]), the subject is 'everyone' (third person), but the speaker is the one who witnessed it. This contrasts with けり, which is the standard for historical storytelling, legends, and hearsay (typically taking a third-person subject). Note that when けり appears in Waka poetry, it almost always expresses sudden realization or exclamation (詠嘆) rather than hearsay.
3. Regular Verb Attachments:
For regular verbs, such as 四段活用（よだんかつよう）, き attaches directly to the 連用形（れんようけい）. For example, 思ふ（おもふ） becomes 思ひき (I thought), and 読む（よむ） becomes 読みし (I read - attributive form).
4. Irregular Attachments and Adjectives:
Special care is needed with irregular verbs and adjectives:
- カ変（来・く）: Attaches to the 未然形（みぜんけい） (こ) or 連用形（れんようけい） (き). Common forms: こし, こしか, きし, きしか. Note that the 終止形 (き) does not attach to カ変 verbs (there is no 「こき」 or 「きき」).
- サ変（す）: The 終止形 (き) only attaches to the 連用形 (し) to make 「しき」. The 連体形/已然形 (し/しか) generally attach to the 未然形 (せ) to make 「せし/せしか」. Forms like 「しし」 or 「ししか」 are non-standard and generally considered incorrect in strict Heian grammar, though they do appear in later texts.
- Adjectives (形容詞): き cannot attach directly to standard adjective forms. It must attach to the 連用形（れんようけい） of the カリ活用（かりかつよう） (e.g., 悲しかりき).
- Adjectival Verbs (形容動詞): き attaches to the 連用形（れんようけい） of ナリ活用（なりかつよう） and タリ活用（たりかつよう） (e.g., 静かなりき).
5. Combinations with Perfective Auxiliaries:
In Heian literature, き frequently combines with the perfective auxiliary verbs つ and ぬ to form てき and にき, emphasizing the completion of a past action (translating to "definitely did" or "have completely done").
6. Modern Survival:
While not used in spoken Japanese today, it survives in formal literary expressions like ありし日（ありしひ） (bygone days) and 聞きしに勝る（ききしにまさる） (to be better than what one heard).
Examples (5)
- 昔、男ありき。
Long ago, there was a man (whom the narrator recalls).
Word by Word: Old-times, man existed-past.
This famous opening from the 'Ise Monogatari' uses the conclusive form 「き」 to state the existence of the man as a remembered fact.
- 見し人の言の葉ぞとも思ほえぬ。
I cannot believe these are the words of the person whom I once saw.
Word by Word: Saw-past person 's words (emphasis) even think-cannot.
Here, 「し」 is the attributive form (連体形) of 「き」, modifying the noun 「人」 (person). It implies the speaker has a personal memory of seeing this person.
- もし酒ありせば、飲まましものを。
If only there had been sake, I would have drunk it.
Word by Word: If sake exist-past-if, drink-would although.
This uses the irrealis form 「せ」 in the 「せば…まし」 construction to express a counterfactual wish about the past.
- 聞きしに勝る美しさかな。
It is a beauty even greater than what I had heard (and now see).
Word by Word: Heard-past-to surpass beauty (exclamation).
A common fossilized expression where 「し」 indicates the past action of hearing something which is now being personally verified.
- 京へ行きしかば、面白きこと多かりき。
Because I went to the capital, there were many interesting things.
Word by Word: Capital to went-past-because, interesting things many-were-past.
This demonstrates the 已然形（いぜんけい） form 「しか」 followed by 「ば」, which translates to 'because' or 'when' in Classical Japanese.
Common Mistakes
Confusing the past auxiliary き/し with adjective endings (識別 - identification).
寒き冬（さむきふゆ）咲きき（さきき）Learners often confuse the past auxiliary with adjective endings. In 寒き冬（さむきふゆ）, 「き」 is the 連体形 (attributive form) of a Ku-adjective, not the past tense. Similarly, in 花美し（はなうつくし）, 「し」 is a Shiku-adjective ending. The golden rule of thumb for identification is: If 「き」 or 「し」 is attached to the 連用形（れんようけい） of a verb, it is the past tense auxiliary.
Using き for hearsay or general historical storytelling.
（伝聞）昔、桃太郎ありき。（伝聞）昔、桃太郎ありけり。If you are telling a story you heard from someone else (hearsay) or recounting a historical legend, you should use けり. 「き」 is strictly reserved for things you personally experienced, remember, or for absolute assertions.
How It Connects
Learn This First
The pattern 'き' is a classical Japanese auxiliary verb used to indicate the direct past (recollection of personal experience). To understand it, a learner needs to be familiar with how verbs are conjugated into stems and how the modern past tense ('た') functions, as 'き' serves a similar purpose in classical literature and formal set phrases.
- た形Plain Past
The modern past tense 'た' is the direct functional equivalent of the classical 'き'. Knowing how the past tense works in modern Japanese provides the necessary conceptual foundation.
Level 2 - Honorific language overview
Since 'き' is a classical grammar point often encountered in formal, literary, or highly respectful contexts, an understanding of honorific levels helps contextualize its usage.
Level 3
Related Patterns
- けりPast/exclamatory (Classical)
The counterpart to 「き」, used for hearsay past or sudden realization, whereas 「き」 is for direct experience.
Level 6 - ばIf (Hypothetical)
The irrealis form of 「き」 (せ) is frequently used with the 「ば」 particle to create counterfactual past conditionals.
Level 2 - なり（断定）Copula (Classical)
Often appears alongside 「き」 in classical texts to provide description or assertion in the past tense.
Level 6 - ましWould (Classical)
Commonly paired with the 「せ」 form of 「き」 to express 'would have' in hypothetical past situations.
Level 6
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