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in seinem Schlafzimmer

in his bedroom

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phrase Rare #31,095
in his bedroom Used to say someone is inside their bedroom. "seinem" is the dative form of "sein" here.
GE: Er liest in seinem Schlafzimmer.
EN: He is reading in his bedroom.

Tom war in seinem Schlafzimmer.

Tom was in his bedroom.

Tom hat einen großen Wandschrank in seinem Schlafzimmer.

Tom has a large closet in his bedroom.

Tom hat einen großen Schrank in seinem Schlafzimmer.

Tom has a large closet in his bedroom.

Tom ist nicht in seinem Schlafzimmer.

Tom is not in his bedroom.

Er war in seinem Schlafzimmer.

He was in his bedroom.

Manchmal isst Tom in seinem Schlafzimmer.

Sometimes Tom eats in his bedroom.

Ich kann Tom in seinem Schlafzimmer Gitarre spielen hören.

I can hear Tom playing guitar in his bedroom.

Tom isst manchmal in seinem Schlafzimmer.

Tom sometimes eats in his bedroom.