Breakdown of Почему ты мучишься ночами из-за этой ошибки?
ночь
night
ты
you (singular)
этот
this [f: эта, n: это]
почему
why
Questions & Answers about Почему ты мучишься ночами из-за этой ошибки?
Why is ночами in the Instrumental case here?
It is the bare Instrumental plural of ночь (night). This structure is used to express an action that is repeated regularly or lasts for an extended duration. In this sentence, it translates to 'night after night' or 'during the nights'.
Could we just say каждую ночь instead of ночами?
Yes, каждую ночь (every night) in the Accusative case would communicate the same basic fact. However, using the Instrumental ночами emphasizes the long, continuous duration of the suffering stretching out over multiple nights, giving it a slightly more dramatic tone.
Why use из-за for 'because of' instead of потому что?
Потому что means 'because' and must introduce a full clause with a new subject and verb. To say 'because of' followed by a noun phrase, you need a preposition. Из-за requires the Genitive case (seen here in этой ошибки) and is the standard way to express a negative or frustrating cause.
I sometimes see this verb spelled as мучаться. Why is it мучишься here?
There are two accepted forms of this verb. Мучиться is the standard form, which conjugates as a regular type II verb with 'и' endings (ты мучишься). Мучаться is a colloquial alternative that uses type I endings. This sentence uses the standard, more formal spelling.