Learn Dutch: Jullie hebben een grote stellingkast in de garage staan. - You guys have a large shelving unit standing in the garage.

This structure (hebben + direct object + location + posture verb) is a possessive locative state. It neatly combines two pieces of information: that you own the shelving unit (hebben), and its physical orientation and location (in de garage staan). This sounds much more natural in Dutch than saying "You have a shelving unit and it is in the garage."

Why do we use staan for a shelving unit instead of another posture verb like liggen?

You use staan because a stellingkast (shelving unit) is typically an upright piece of furniture resting on its base. Dutch is very precise with posture verbs. You would only use liggen if the shelving unit had been knocked over or was lying flat, unassembled in a box.

Why does staan go at the very end of the sentence?

Because hebben and staan form a verb cluster here. In a main clause, the conjugated verb (hebben) takes the second position, while the other verb is pushed to the end as a bare infinitive. The object (een grote stellingkast) and the location (in de garage) are sandwiched in between.

Why is the adjective spelled grote instead of groot?