Questions & Answers about Мы все были в эйфории от победы.
Why does this sentence use в + prepositional case for an emotion instead of an adjective?
In Russian, intense emotional or psychological states are often treated as metaphorical spaces. By saying you are в эйфории, в шоке (in shock), or в восторге (in delight), you are expressing that the emotion completely surrounds or consumes you, much like being inside a physical location.
I expected the prepositional case of эйфория to end in -е. Why does it end in -ии?
This is a declension rule you might remember from earlier levels that remains very strict: feminine nouns ending in -ия (like эйфория, история, Россия) always take -ии in the prepositional case, never the standard -е.
Could we use из-за победы instead of от победы to express the cause of the euphoria?
You could be understood, but от + genitive case is much more natural here. От is the standard preposition used to show the direct, immediate trigger of a physical or emotional state (like crying from joy). Из-за is typically used for external obstacles or more indirect, often negative, reasons.
Is there a difference between saying Мы все были and Все мы были?
They are virtually interchangeable, but there is a slight nuance. Мы все is the most standard, neutral word order. Putting Все first (Все мы) adds a very slight emphatic tone, focusing heavily on the fact that every single one of the group members felt exactly the same way.