Breakdown of Мой брат был в бешенстве из-за ошибки.
брат
brother
мой
my (мой, моя, моё) / mine
в
in / to (direction)
ошибка
mistake
быть
to be
из-за
because of; from behind
бешенство
fury
Questions & Answers about Мой брат был в бешенстве из-за ошибки.
Why is в бешенстве used here instead of an adjective for 'furious'?
The phrase в бешенстве uses the preposition в plus the prepositional case to describe an intense emotional state. In Russian, placing a person 'inside' an emotion (literally 'in a fury') is a highly natural way to express a temporary, overwhelming state of mind, which often sounds more expressive than just using an adjective.
What is the dictionary form of бешенстве, and how does it decline here?
The dictionary (nominative) form is бешенство (fury, rage, or rabies), which is a neuter noun. Because it ends in -о, it takes the standard -е ending in the prepositional case. It shares a root with the adjective бешеный (mad, furious, rabid).
Why do we use из-за here instead of потому что for 'because of'?
из-за is a preposition used to point directly to a noun as the cause of something, and it requires the genitive case (changing ошибка to ошибки). You would use потому что only if you were introducing a full clause with a subject and verb, such as 'because someone made a mistake'.
Could I use the preposition от instead of из-за for the cause?
While от plus the genitive is used for causes, it usually describes involuntary physical or emotional reactions directly triggered by something (like jumping from a loud noise or crying from joy). из-за is much better here because the mistake is the external reason or fault that led to the brother's anger, rather than a direct sensory trigger.
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