Breakdown of Геолог поехал в экспедицию на север.
в
in / to (direction)
на
on, at / by (transport) / to (a place) / to (in answer to)
север
north
поехать
to go (by transport)
геолог
geologist
экспедиция
expedition
Questions & Answers about Геолог поехал в экспедицию на север.
Why use поехал instead of ездил?
The prefix по- added to the one-way verb ехать creates a perfective verb (поехать). In the past tense, it focuses on the departure or the start of the journey. It tells us the geologist set off or departed by transport. If we used ездил, it would mean he went to the north and has already returned.
English says he went 'on' an expedition. Why does Russian use в instead of на?
While English uses 'on' for trips, tours, and expeditions, Russian treats an expedition as an organized event or group that you join. Therefore, you must use в (into) rather than на (onto).
Why does the dictionary word экспедиция change to экспедицию?
Because it is the destination of a motion verb. When showing direction or answering the question 'where to?', the prepositions в and на require the accusative case. For feminine nouns ending in -я, the ending changes to -ю.
Why is it на север and not в север?
In Russian, compass directions like north (север), south (юг), east (восток), and west (запад) always take the preposition на to indicate motion towards them, never в. Since север is an inanimate masculine noun, its accusative form looks exactly like its dictionary form.
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