Breakdown of Система отправила напоминание за два часа до встречи.
встреча
meeting
два
two
час
hour
отправить
to send (perfective)
до
before, until
система
system
за ... до
before (as in "an hour before the flight")
напоминание
reminder
Questions & Answers about Система отправила напоминание за два часа до встречи.
How does the phrase за два часа до translate to "two hours before"?
In Russian, to say how much time passed before an event, we use the formula за + [amount of time in Accusative] + до + [the event in Genitive]. Here, the amount of time is два часа (two hours) and the event is встречи (the meeting).
If the amount of time after за is in the Accusative case, why does часа look like it's in the Genitive case?
The preposition за does require the Accusative case for the whole phrase. The number два is in the Accusative (which looks identical to the Nominative for inanimate objects). However, the rule for numbers 2, 3, and 4 dictates that the noun following them must be in the Genitive singular. So, часа is Genitive singular because of the number два, even though the entire phrase два часа serves as the Accusative object of за.
Why does встреча change to встречи at the end of the sentence?
The word встреча (meeting) is the event that happens after the time period. In this construction, the event following the preposition до (until/before) must always be in the Genitive case. For feminine nouns ending in -а, the Genitive ending is usually -ы, but it becomes -и here due to the spelling rule after the letter ч.
Why use the perfective verb отправила instead of the imperfective отправляла?
The system sent a single, completed reminder at a specific point in time (two hours before the meeting). Because this is a one-time, successfully completed action with a concrete result, we use the perfective aspect отправила.
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