Bist du das?
The German phrase "are you" is expressed as Bist du das? when asking if a person is the one being seen or heard.
This phrase is used for identification purposes, such as asking someone through a door or over the phone if they are the person you expect. It should not be confused with using "are you" to ask about a state or quality, such as asking if someone is tired.
Which one should you use?
Bist du das? is used specifically for identification. In contrast, if you want to ask if someone possesses a certain quality or is in a certain state, you would use Bist du followed by an adjective (for example, Bist du müde? for "Are you tired?"). Additionally, while Bist du das? is standard, Bist du es? is a less common variation used when referring to a specific identity or "it".
How does it change in a sentence?
When addressing someone formally, you must use the form Sind Sie das? rather than the informal Bist du das?
When do people say it?
If someone asks you Bist du das?, a natural way to respond is Ja, ich bin's. (Yes, it's me) or Ja, das bin ich (Yes, that is me).
Did you know?
- The German word bist actually comes from two different ancestral sources that merged together. One source provided the core meaning of 'to be', while a second source added the initial 'b' sound.
- While Bist du das? is used for visual or auditory identification, switching to Sind Sie das? is not just about politeness. In professional German settings, using the informal du for identification can be seen as a significant boundary violation.
- The word du is a distant relative of the English word 'thou'. While 'thou' has become archaic in modern English, du remains the standard way to address friends and family in German.
Examples in context
- Sind Sie vielleicht Herr Schmidt?Are you perhaps Mr. Schmidt?
- Bist du mein Freund?Are you my friend?
- Bist du vielleicht müde?Are you perhaps tired?
- Ich höre jemanden. Bist du das?I hear someone. Is that you?
Sources
- Word origins: Wiktionary entries bist, das, du, CC BY-SA 4.0.
