De deur is open, maar ik sluit haar straks.

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Breakdown of De deur is open, maar ik sluit haar straks.

• zijn: to be
• maar: but
• de deur: the door

Questions & Answers about De deur is open, maar ik sluit haar straks.

Why does Dutch say is open instead of something like is opened?

In this sentence, open is an adjective, not a past participle.

• De deur is open = The door is open
• It describes the state of the door.

Compare:

• De deur is open = the door is in an open state
• De deur is geopend = the door has been opened / the door is opened

So open is the normal, natural choice when you want to describe the condition of the door.

Why is haar used for de deur? A door is not a female person.

This is a very common question.

In Dutch, some nouns can be referred to with grammatical gender, not natural gender. De deur is traditionally a feminine noun, so you may see haar used to refer back to it.

So:

• de deur → haar

However, this can sound formal, literary, or regional to many learners, especially in modern Dutch from the Netherlands. In everyday speech, people often avoid this kind of pronoun for objects.

A speaker might instead say:

• De deur is open, maar ik sluit de deur straks.
• De deur is open, maar ik doe hem straks dicht.

So haar is grammatically explainable, but not always the most neutral everyday choice for modern spoken Dutch.