〜ことか: 'How...!' (Deep Emotion)
The feeling behind the fake question
〜ことか takes a question word and turns it into a heartfelt exclamation. The speaker isn't seeking an answer — they're conveying that the feeling was beyond words. The question word (どんなに "how much," なんと "how," どれほど "to what extent," 何度 "how many times") sets up the intensity, and ことか delivers the emotional punch:
この日をどんなに待っていたことか。
この ひを どんなに まって いた ことか。
How long I've waited for this day!
どんなに…ことか = how very… — it's an exclamation, not a real question.
ヤッタンに何度注意したことか。
ヤッタンに なんど ちゅういした ことか。
How many times have I warned Yattan!
何度…ことか = expressing exasperation at the sheer number of times.
合格と聞いて、どれほどうれしかったことか。
ごうかくと きいて、どれほど うれしかった ことか。
How happy I was when I heard I'd passed!
English gets the same effect with "How…!" or "I can't tell you how…" — the point is that the intensity overflows any figure you could name.
The question word carries the sentence
The opening question word is the essential ingredient — どんなに / なんと / どれほど / いかに for degree, 何度（も）/ 何回 for frequency — and without one the pattern falls flat. Attach ことか to the plain form of what comes before it:
| Word type | Attachment | Example |
|---|---|---|
| Verb | plain form + ことか | どんなに泣いたことか (how much I cried) |
| い-adjective | plain form + ことか | どれほどうれしいことか (how happy I am) |
| な-adjective | な + ことか | どんなに静かなことか (how quiet it is) |
| Noun | (rare) — usually recast | — |
| Softer variant | …ことだろう / ことでしょう | どんなにうれしいことだろう (how happy [I'd be]!) |
Note the one attachment trap in that table: な-adjectives need な before ことか (どんなに静かなことか, never ×静かことか).
The softer cousin: 〜ことだろう
The variant 〜ことだろう / 〜ことでしょう softens the exclamation slightly and turns up when you're imagining or wishing rather than recalling something that happened. It's the same "how very…!" force with a more reflective, less blunt edge:
先生がいてくれたら、どんなに心強いことだろう。
せんせいが いて くれたら、どんなに こころづよい ことだろう。
How reassuring it would be if Sensei were here!
ことだろう = a softer, more reflective version of ことか.
モチに会えなくて、どれほど寂しかったことか。
モチに あえなくて、どれほど さびしかった ことか。
How lonely I was, unable to see Mochi!
弟が無事だと知って、なんとほっとしたことか。
おとうとが ぶじだと しって、なんと ほっとした ことか。
What a relief it was to learn my little brother was safe!
Pitch it to real, big emotion
〜ことか leans literary and emotional. You'll see it in novels, essays, speeches, and heartfelt spoken moments — not in casual everyday chat about lunch. It works best with genuinely big feelings: relief, longing, gratitude, frustration, joy. Because it carries weight, two habits make it misfire:
- Reaching for it over trivia. ことか is heavy and literary; for a small everyday "I really wanted that," plain 〜たい or とても sounds far more natural.
- Answering it like a question. It's rhetorical — no reply is expected. Don't chase it with question intonation hunting for an answer; it ends a thought with feeling.
Save it for when the emotion is real and strong, keep the degree word up front, and remember it's voicing a feeling, not opening a query.
In a nutshell
- 〜ことか = an exclamation of strong emotion: "How very…! / How many times…!"
- Needs a question word in front: どんなに / なんと / どれほど / 何度.
- Attaches to plain forms; な-adjectives take な.
- It's rhetorical, not a real question — you're voicing a feeling.
- Softer variant: 〜ことだろう / ことでしょう; register is literary/emotional.
Practice it
Complete each sentence with the right question word + ことか.
＿＿＿に入れるのに最もよいものを選びなさい。
どんなに待った＿＿＿。
Frequently asked questions
Is 〜ことか a question?
No — it only looks like one. It's a rhetorical exclamation of strong emotion. どんなに心配したことか means 'How worried I was!', not 'Did I worry?' No answer is expected.
What's the difference between ことか and ことだろう?
They're very close. ことだろう / ことでしょう is a softer, more reflective version, common when imagining or wishing (どんなにうれしいことだろう 'how happy I'd be!'). ことか feels a touch more direct and exclamatory.
Which question words go with ことか?
For degree: どんなに, なんと, どれほど, いかに. For frequency: 何度(も), 何回. The question word is required — it's what gives ことか its 'how very…!' force.
How does な-adjective attach?
Add な before ことか: どんなに静かなことか. Verbs and い-adjectives use their plain form directly: 泣いたことか / うれしいことか.
Where 〜ことか fits
Shaky on this? Get these solid first
- 〜こと · N4 — こと turns a verb or clause into a noun: 話すことは難しい ('speaking is hard'). Learn the formation, こと vs の, and frames like 〜ことがある, 〜ことにする, and 〜ことになる.
Don't confuse it with
- 〜ものだ · N3 — 〜ものだ states general truths and common-sense advice, recalls how things used to be (〜たものだ), and voices strong feeling. Learn all four N3 uses and 〜ものではない.
- 〜わけだ · N3 — 〜わけだ marks a logical conclusion that naturally follows from facts: 'so that means,' 'no wonder,' 'it follows that.' Learn the formation and how it differs from はず and から.
More N3 grammar to explore
Keep going with related patterns at the same level:
- 〜ことに — 〜ことに(は) fronts a sentence with the speaker's emotion: 驚いたことに ('to my surprise'), 残念なことに ('unfortunately'). Learn formation, the feeling-word rule, and placement.
- 〜くせに — 〜くせに means 'even though,' but always carries criticism or blame: 知っているくせに教えてくれない. Learn the formation, the same-subject rule, and how it differs from のに.
- めったに〜ない — めったに〜ない means 'rarely' or 'hardly ever.' Learn why it always pairs with a negative verb, how it compares to あまり〜ない, ほとんど〜ない, and 全然〜ない, plus examples.
- 〜向け vs 〜向き — 〜向け = made/intended for a target audience (子供向けの番組). 〜向き = suited to by nature, or facing a direction (初心者向き, 南向き). Learn the contrast and avoid mixing them up.
- 〜ないことはない — 〜ないことはない is a double negative that softly affirms: 'it's not that I can't / it's possible, I suppose.' Learn the formation, the nuance, and how it differs from 〜ことはない.