The passive voice is a verb form that is used to describe actions or states of being. It changes the perspective of an action or event. While an active sentence emphasizes the subject carrying out an action, a passive construction places emphasis on the action carried out. The subject of a passive sentence is usually the person or thing to which the process is done or happens.

In contrast to the passive voice to describe an action, which you learned about previously, passive constructions that describe a condition place more emphasis on the result of an action. So this type of formulation describes the state of being of the person(s) or thing(s) after the action has taken place.

Example:
Die Gläser sind gespült.
(= In this sentence, the condition of the glasses is important. They are clean. It's not important how they got that way.)

How to form it
To form the passive voice to describe a state of being, German uses the helping verb "sein" and a past participle. The helping verb is conjugated in the present tense. The past participle remains unchanged. In a declarative sentence, the helping verb is in the second position and the past participle goes to the end of the sentence.

Examples:
Die Gläser sind fertig gespült.
Der Boden ist auch gewischt.
Wieso ist die Bar nicht aufgeräumt?

To form a passive sentence, the object of the action moves to the beginning of the sentence or follows the finite verb.

Usually there is no indication of the person carrying out the action in passive sentences that describe a condition.