Questions & Answers about Skoro nie ma autobusu, pójdziemy pieszo.
What does skoro mean here, and how is it different from ponieważ?
Skoro translates to "since" or "seeing that". While ponieważ means "because" and simply states a cause, skoro is used to draw a logical conclusion from an already known situation. You are saying, "Seeing that there is no bus, the logical next step is to walk."
Why is the word autobusu used instead of autobus?
The phrase nie ma (there is no) always forces the following noun into the genitive case. Since autobus is a masculine inanimate noun, its genitive form takes an -u ending here, becoming autobusu.
Why use pójdziemy instead of będziemy szli?
Pójdziemy is the perfective future tense of the verb meaning "to go on foot" (pójść). You use it here because you are talking about a completed, one-time action in the future (we will make the trip). Będziemy szli is imperfective and focuses on the duration, meaning "we will be in the process of walking."
Is pieszo a noun? Do I need to decline it?
No, pieszo is an adverb meaning "on foot". You use it directly with verbs of motion, like iść pieszo (to walk) or podróżować pieszo (to travel on foot). Because it is an adverb, it never changes its form.