Learn Polish: Wychodzę z domu, bo jest późno. - I am leaving the house because it is late.

Wychodzę is actually imperfective, coming from the verb wychodzić. The prefix wy- adds the meaning of "out" to the base verb chodzić (to walk/go). Even though you are learning perfective verbs like wyjść (to have left), you still need the imperfective form to talk about an action happening right now in the present tense.

Why do we use the preposition z before domu?

The prefix wy- (out) naturally pairs with the preposition z (from / out of). When you are expressing motion out of a building or enclosed space, you use z followed by the Genitive case, which gives us z domu.

Why does "it is late" translate to jest późno instead of using an adjective?

When describing general conditions, weather, or time where English uses a dummy "it" (like "it is late" or "it is cold"), Polish doesn't use a subject pronoun at all. Instead, it uses the verb jest paired with an adverb ending in -o, like późno.

Could wychodzę z domu also mean "I am moving out of the house"?