Compound postpositions must be used with the genitive oblique cases when using them with the personal pronouns (except the "2P" formal āp). So, when using the compound postposition "ke andar – "inside"", *"mujh-ke andar" and *"mujh andar are grammatically invalid constructions and instead it should be mere andar –" ""inside me"". The compound postpositions that have the primary postposition kī in place of kā must have the genitive oblique case declined to the feminine gender. So, when using the postposition kī taraf – "towards", it should be merī taraf and not *mere taraf.