Hot answers tagged particle-ka
I never did figure out what the right answer was in traditional grammar, but I ended up reading in a linguistics paper somewhere that this is a complementizer. In other words, it turns a clause into a complement of the following verb. In your example, it turns どこにある into an interrogative complement of the verb 知っています: 1. デパートはどこにあるか？ As ...
Only top voted, non community-wiki answers of a minimum length are eligible