Grammar Info
N4 Lesson 10: 12/18

(Question-Phrase) + か
including questions within sentences

Do not attach だ or です to nouns or な-adjectives preceding か

Question Word + + わかる(1)

(1) 覚える、決める、知っている and so on
Register Standard
使用域 一般
Often, the 副助詞(ふくじょし) (adverbial particle) is used in the middle of a sentence, in the same way that it is as a 終助詞(しゅうじょし) (sentence ending particle). The main differences are as follows:
副助詞(ふくじょし) - Highlights 不確(ふたし)かであること ‘uncertain things’. This is the same か as in どこか ‘somewhere’.
終助詞(しゅうじょし) - Highlights 疑問(ぎもん)質問(しつもん) ‘doubts and questions’. This is a direct question.
In the case of the adverbial particle and ‘uncertain things’, this will almost always be followed by a word that is seeking information about the uncertain thing.
  • 忘年会(ぼうねんかい)社長(しゃちょう)来(く)る分(わ)かります
    Do you know if the CEO is coming to the end of year party? (Literally, ‘If the CEO is coming, do you know?’)
  • これ足(た)り分(わ)か
    Do you know if this is enough? (Literally, ‘If this is enough, do you know?’)
  • 何(なん)でこのビル壊(こわ)知(し)っています
    Do you know why they are destroying this building? (Literally, ‘Why they are destroying it, do you know?’)
  • お祭(まつ)り何時(なんじ)終(お)わ知(し)ってる
    Do you know what time the festival is going to end? (Literally, ‘What time it will end, do you know?’)
As can be seen in these examples, sometimes the 副助詞(ふくじょし) will appear by itself, and sometimes it will appear together with the 終助詞(しゅうじょし) in the same sentence. However, due to the ‘uncertainty’ being displayed by the adverbial particle, the question marker at the end of the sentence is not required.
This should not be preceded by (or です), this is why words like どこか and 誰(だれ)か are not どこだか and 誰(だれ)だか.
Slow Male
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Do you know where I am?
[someone hiding from the listener]
Have you decided when you are going to the art museum?
Do you know what kind of flavor(s) he likes?
Genki II 2nd Edition
Page 192
Tae Kim's Japanese Grammar Guide
Page 98
[AIAIJ] An Integrated Approach to Intermediate Japanese
Page 36