Comitative Case (Хамтрах)
Used to express a person and/or a thing that accompanies the subject of a sentence.
Meaning: “To have, with, together with”
Questions: With whom; With what? Хэнтэй? Юутай?
Suffixes (following vowel harmony): -тай, -той, -тэй
Pronouns:
| First person | Надтай (with me) | Бидэнтэй (with us) |
| Second person | Чамтай/ Таньтай (with you) | Та нартай (with them) |
| 3rd person | Түүнтэй (with him/her) | Тэдэнтэй (with them) |
Uses of Comitative case:
Багш + нар + тай + гаа= With my teachers
Breakdown:
Багш (subject) + нар= teachers (pluralizes subject)
тай= with (Comitative case usage)
(г)аа= my/ ownership of subject (Reflexive ending)
Examples:
Чи хэнтэй хөдөө явсан бэ? With whom did you to do the countryside/ Who did you go to the countryside with?
Би ээжтэйгээ хамт хөдөө явсан. I went with my mother to the countryside
Монгол улс 21 (хорин нэгэн) аймагтай. Mongolia has 21 provinces
Postpositions with Comitative case:
Хамт: “together with”
Надтай хамт суу (Come sit (together) with me)
Цуг: “together with”
Надтай цуг (Together with me)