What does question marker mean?

Definition

A sentence-final grammatical particle marking a question, with its conversational effect depending on politeness and context.

Example sentences

• Is this your book?🔊

  Is this your book?

• Are you a teacher?🔊

  Are you a teacher?

• Oh, is that so?🔊

  Oh, is that so?

question marker in other languages

• In Portuguese
• In French
• In Japanese