Georgian by and large does not have prepositions but rather postpositions. Most of the most common of these are cliticized to the ends of nouns. They might be written separately or together with the noun. There do exist a few prepositions, but they are very few in number, and tend to be calques from Russian that entered the language during the Soviet period.
Each postposition governs (requires) a specific case of the noun, akin to the usage of prepositions in German or Latin. Only one postposition governs the nominative case (-vit "like"), and there are no postpositions that govern the ergative or the vocative cases. Here are some examples of postpositions:
|-tan ertad||together with||dative|
|-shi ²||in, to||dative|
|-dan 4||from (a place)||instrumental|
|-gan||from (a person, a thing)||genitive|
|miuxedavad||in spite of||genitive|
|-ts'in||before, in front of||genitive|
|-mde ³||up to, as far as||adverbial|
¹ The postposition -vit could also take the dative case in its elongated form (with an insertion of -a- in between the case suffix and the postposition).
³ In the usage of postposition -mde the adverbial case suffix -d is dropped.
4 In the usage of postposition -dan the instrumental case suffix -t is dropped.
Read more about this topic: Georgian Grammar
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... Postpositions with the genitive case and declinable (illative/allative - inessive/adessive - elative/ablative) alla - all - allt (under), ette - ees - eest (in front of), juurde - juures - juurest (at), järele - järel - järelt (after), keskele - keskel - keskelt (in the middle), kohale - kohal - kohalt (above), kõrvale - kõrval - kõrvalt (beside), kätte - käes - käest (in the hand of), lähedale - lähedal - lähedalt (near), peale - peal - pealt (on), sisse - sees - seest (in), taha - taga - tagant (behind), vahele - vahel - vahelt (between), äärde - ääres - äärest (by) with the genitive case and non-declinable eest / jaoks (for), järgi (according to), kaudu (via), kohta (about), pärast (on account of), vastas (vis-à-vis), vastu (against), üle (over), ümber (around) with the partitive case mööda (along) with the elative case alla (down), läbi (through), peale / saadik (since) Prepositions with the genitive case läbi (through), peale (besides), üle (over), ümber (around) with the partitive case alla (down), enne (before), kesk / keset (amid), mööda (along), piki (alongside), pärast (after), vastu (against) with the terminative case kuni (until) with the abessive case ilma (without) with the comitative case koos / ühes (with). ...