The dative case
The dative is the case of the recipient. It marks indirect objects ('to whom?'), and Russian uses it for several distinctive things English handles differently — most importantly age and obligation.
Dative endings (singular)
Masculine: -у / -ю. Иван → Ивану. Друг → другу. Feminine -а: → -е. Анна → Анне. Книга → книге. Feminine -я: → -е. Семья → семье. Neuter -о: → -у. Окно → окну. The pattern is mostly 'add -е to feminines, -у to others'.
Personal pronouns in dative
я → мне. ты → тебе. он / оно → ему. она → ей. мы → нам. вы → вам. они → им. After prepositions like к (to/towards), the н- prefix appears: ему → к нему, ей → к ней, им → к ним.
Indirect object
When you give, say, write, or show something TO someone, that someone takes the dative: Я говорю Анне = I'm telling Anna. Папа дал мне книгу = Dad gave me a book.
Age
Russian asks 'how many years to you?' for age. The person takes the dative: Сколько тебе лет? = How old are you? Мне 25 лет = I'm 25 (lit. 'to-me 25 years'). The person whose age it is is in the dative.
Need and obligation
Мне нужно = I need to / I have to. Анне надо работать = Anna needs to work. The needy person goes in the dative.
