Many relations that English and Russian put before a noun come after it in Finnish, and the noun before them takes the genitive: talon edessä (in front of the house, перед домом), pöydän alla (under the table), viikon kuluttua (in a week, через неделю), loman aikana (during the holiday). The genitive marks the landmark, and the little word after it says how you stand to it.
Lähdemme lomalle viikon kuluttua.We’re going on holiday in a week.
Counts forward, from now or from any moment in a story: hetken kuluttua alkoi sataa is a moment later. Päästä means the same and is the usual word in speech. Like talon edessä, the landmark takes the genitive: kahden viikon kuluttua.
G + aikoihin / maissa / paikkeilla
around, about (a time) · около
Tulen kahden aikoihin.I’ll come around two.
Three ways to say about the same time. Maissa goes mostly with clock times, aikoihin with other times too (samoihin aikoihin, around the same time), and paikkeilla with places as well. The number before them takes the genitive: kahden, not kaksi.
G + aikana
during, within · во время; за
Loman aikana luin monta hyvää kirjaa.During the holiday I read lots of good books.
Something happens inside the period, at one point or several. A stretch that fills the whole period is a measure instead: Satoi koko päivän, it rained all day.
Watch out
Traps
A number before the little word goes into the genitive with its noun: kahden viikon kuluttua, not kaksi viikkoa kuluttua.
Sitten (ago) is not one of them: it takes the plain count, kaksi viikkoa sitten.
Retrieval
Practice
Every item from every lesson that practises this concept, spaced like the rest of your reviews.
18 sentences across every lesson.
Spacing
Coming back
Do a practice round today, then come back in two days. Missed items return first.