W wyniku wybuchu budynek się zawalił.

Breakdown of W wyniku wybuchu budynek się zawalił.

budynek
building
zawalić się
to collapse
w wyniku
as a result of
wybuch
explosion

Questions & Answers about W wyniku wybuchu budynek się zawalił.

Why is the word for explosion in the form wybuchu instead of its dictionary form wybuch?
The phrase w wyniku (as a result of) is a compound preposition that always requires the following noun to be in the Genitive case. Because of this, the Nominative wybuch changes to its Genitive form, wybuchu.
How do I know whether a masculine inanimate noun like wybuch takes an -a or -u ending in the Genitive?
Masculine inanimate nouns can be tricky because they take either -a or -u in the Genitive singular. While there are exceptions, a general rule is that tangible, countable objects often take -a, whereas abstract concepts, natural phenomena, and nouns derived from verbs (like wybuch, which relates to the action of exploding) usually take -u.
Could we use na skutek instead of w wyniku in this sentence?
Yes, absolutely! Na skutek and w wyniku are practically interchangeable. They both mean "as a result of" and both require the Genitive case. You could say Na skutek wybuchu budynek się zawalił with no change in meaning.
Why do we need the reflexive pronoun się in budynek się zawalił?
The base verb zawalić is transitive, meaning to ruin, collapse, or cave something in (an action done to an object). By adding się, it becomes the intransitive zawalić się, which means a subject collapsed on its own. Without się, the sentence would feel incomplete, as if you were waiting to hear what the building collapsed onto.

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