Time, duration, and accusative prepositions
Accusative singular also appears in common temporal and prepositional frames.
- Some time nouns remain unchanged because their accusative equals nominative: ка́ждый день. Feminine forms expose the case: всю неде́лю.
- Case does not equal one English preposition: Russian про and о both express topic but govern different cases: про кни́гу (accusative), о кни́ге (prepositional).
| Frame | Example | Meaning |
|---|---|---|
| bare duration | рабо́тать всю неде́лю | work all week |
| frequency unit | ка́ждый день | every day |
| в + time | в понеде́льник | on Monday |
| на + planned span | на неде́лю | for a week |
| че́рез + acc. | че́рез мину́ту | in/after a minute |
| про + acc. | про кни́гу | about the book (neutral-colloquial) |
Mini-check
1. Form: всю + неде́ля; че́рез + мину́та. 2. Contrast 'about the book' with про and о.
Apply this next
- Retrieve the rule without looking, then continue to the next lesson.