The Prepositional Case (Предложный падеж) is used primarily to indicate location (using в - in, or на - on) or the topic of thought/speech (using о/об - about). In the singular, adjectives, possessives, and pronouns must agree with the gender of the noun they modify.
Adjectives follow a "strong" pattern where the ending depends on the gender of the noun:
Possessives like "my" (мой) and "your" (твой) change based on gender:
The word это (this/it is) is often used as an invariable particle. However, the adjective весь (all/whole) changes to match the noun:
Personal pronouns and question words have specific forms in the prepositional case:
Note: When "он" (he) or "оно" (it) follows a preposition, an 'н' is added to the start (нём).
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