bist du dir

are you

→ sein
phrase Common #7,060
are you Often followed by an adjective such as sicher (“sure”) or bewusst (“aware”); dir is usually not translated separately.
GE: Bist du dir sicher, dass das funktioniert?
EN: Are you sure that will work?

Bist du dir absolut sicher, daß Tom und Maria das tun müssen?

Are you absolutely sure that Tom and Maria have to do this?

Bist du dir sicher?

Are you sure?

— TÁR (2022)

Bist du dir sicher in deiner Entscheidung für Sebastian?

Are you sure about your decision to choose Sebastian?

— TÁR (2022)

Ja, bist du dir da wirklich so sicher?

Are you really that sure?

— Five Nights at Freddy's 2 (2025)

Bist du dir da ganz sicher?

Are you absolutely sure about that?

Bist du dir ganz sicher, daß das passieren wird?

Are you absolutely sure that’s going to happen?

Bist du dir bewusst, wie sehr sie dich liebt?

Are you aware of how much she loves you?

Bist du dir über die Risiken im Klaren?

Are you aware of the risks?

Bist du dir sicher, Neville?

Are you sure, Neville?

— Harry Potter und der Feuerkelch (2005)

Wie sicher bist du dir?

How sure are you?

— Juno (2007)

Bist du dir eigentlich im Klaren darüber, dass du eine Nervensäge bist?

Are you actually aware that you're such a nuisance?