本当（ほんとう）に行（い）きたいのかい？

もう酔（よ）っている？久（ひさ）しぶりに飲（の）んだのかい？

明日（あした）テストがあるって言（い）ってただろう。復習（ふくしゅう）しないのかい？

あの人（ひと）が知（し）らないのに、そんなことを言（い）っていいのかい？

これだけで十分（じゅうぶん）なのかい？

その帽子（ぼうし）を被（かぶ）って行（い）くのかい？

どうしたの？恥（は）ずかしいのかい？

この番組（ばんぐみ）を見（み）たくないのかい？

何（なに）その顔（かお）？僕（ぼく）が翻訳（ほんやく）した文章（ぶんしょう）が変（へん）なのかい？

冗談（じょうだん）で言（い）っていたと思（おも）った。真面目（まじめ）なのかい？

彼（かれ）が高（たか）いレストランに行（い）こうと言（い）ったのに払（はら）わないのかい？

君（きみ）の口（くち）すごい匂（にお）いがするよ。歯医者（はいしゃ）に行（い）かなくていいのかい？

かい - how is it different from just か?

Sentence-ending Particles だい and かい

<div class='writeup-body'>The sentence ending particle かい is a grammar structure that is used in Japanese to highlight a question. Despite commonly being thought of as one word, it is actually the combination of か (the sentence-ending particle) and い, another sentence-ending particle that is primarily used by men (in a similar way to ね and よ). かい will usually be used directly after the word/phrase that it is highlighting. In the case of verbs and い-Adjectives, の may be inserted before かい. For な-Adjectives and nouns, なの may be inserted directly before it. However, の (or なの) are frequently omitted, due to how casual かい is.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'> このドーナッツを食（た）べたいのかい？</div><div class='writeup-example--english'>Do you want to eat this donut?</div></li><li class='writeup-example'><div class='writeup-example--japanese'>このおもちゃが欲（ほ）しいのかい？</div><div class='writeup-example--english'>Do you want this toy?</div></li><li class='writeup-example'><div class='writeup-example--japanese'>彼女（かのじょ）は綺麗（きれい）なのかい？</div><div class='writeup-example--english'>Is your girlfriend pretty?</div></li><li class='writeup-example'><div class='writeup-example--japanese'>彼（かれ）はいい人（ひと）なのかい?</div><div class='writeup-example--english'>Is he a good person?</div></li></ul>When it is not omitted, の (or なの) may be shortened to ん (or なん）. This is in the same way that の and なの would behave in the のです and なのです grammar structures.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>お前（まえ）も一緒（いっしょ）に行（い）きたいんかい？</div><div class='writeup-example--english'>Do you also want to come with me?</div></li><li class='writeup-example'><div class='writeup-example--japanese'>大学生（だいがくせい）なんかい。中学生（ちゅうがくせい）だと思（おも）った。</div><div class='writeup-example--english'>You are a college student? I thought you were a middle schooler.</div></li></ul>Although there are some exceptions, かい will almost always be used to ask simple yes/no questions.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>勉強（べんきょう）してるのかい？</div><div class='writeup-example--english'>Are you studying?</div></li></ul><div class='writeup-caution'><div class='caution-header'>Caution</div>Because かい is very casual, and quite direct, it often sounds like an accusation. Due to this, care should be taken with your tone of voice, so as not to be taken the wrong way.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>また鍵（かぎ）をなくしたんかい。</div><div class='writeup-example--english'>You lost your keys again, didn't you?</div></li></ul></div><div class='writeup-funfact'><div class='funfact-header'>Fun Fact</div>Outside of かい, the sentence ending particle い is not commonly used in modern Japanese, and therefore will only appear in a few very specific structures (like だい). Despite being similar to ね, い is considered to be fairly ぞんざい 'rough', and should only be used with people that you are very familiar with, and never to someone above you.</div></div>

Grammar Info

かい

Question marker