फ्लैट कब से खाली है?

flat; apartment

Breakdown of फ्लैट कब से खाली है?

• खाली होना: to be available; vacant
• कब से: from when?

Questions & Answers about फ्लैट कब से खाली है?

What does कब से mean here?

कब से literally means since when. In natural English, this sentence is often understood as How long has the flat been empty?

So in this sentence:

• कब = when
• से = since / from

Together, कब से asks about the starting point of a continuing situation.

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Why is से used after कब?

In Hindi, से is commonly used to mark a starting point in time.

Compare:

• फ्लैट कब खाली है? → this is not natural Hindi
• फ्लैट कब खाली था? → When was the flat empty?
• फ्लैट कब से खाली है? → Since when has the flat been empty? / How long has the flat been empty?

So कब asks for a time, but कब से asks for the beginning of an ongoing period.

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Why does Hindi use है instead of something like has been?

This is a very common point for English speakers.

Hindi often uses the present form of होना (है) with a state that began in the past and continues now, especially when the sentence already includes कब से.

So:

• फ्लैट कब से खाली है?

literally looks like: