In the following sentence


what is the grammatical role of か?

  • It makes an embedded question. I think you may need to be a bit more specific about what your problem is. Commented Sep 6, 2020 at 12:21
  • The question is why instead of こと, か is being used in the sentence. Commented Sep 6, 2020 at 12:25

1 Answer 1


From your comment it seems you are asking about the difference between:

  1. 今日は何の映画を見るか決めた
    Today I decided on which film I will watch.
  2. 今日は何の映画を見ること(を)決めた

In 1) 何の映画を見るか (which film will I watch) is an embedded question. The whole phrase behaves like a noun, which can take the optional object particle を. So the basic structure is

Today I decided on X

where X is "what film I will watch".

I don't believe sentence 2) is grammatical because of the question part 何の in it. You could say:

I decided on watching a film

but that is a different structure with a different meaning.

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