彼(かれ)等(ら) kareraが gaいつ itsu戻(もど)っ()て()く()る() modottekuruか ka知(し)っ()て()い()ま()す() shitteimasuか ka。 Do you know when they're coming back? Literal They [subject-が] when return [question-か] know [question-か]? いつ戻ってくるか is an embedded question: 'when they will come back.' 知っていますか asks about the listener's knowledge. daily lifeembedded questionembedded wh-question
彼(かれ)等(ら) kareraが gaいつ itsu戻(もど)っ()て()く()る() modottekuruか ka知(し)っ()て()い()ま()す() shitteimasuか ka。 Do you know when they're coming back? Literal They [subject-が] when return [question-か] know [question-か]? いつ戻ってくるか is an embedded question: 'when they will come back.' 知っていますか asks about the listener's knowledge. daily lifeembedded questionembedded wh-question