Allen and Greenough's New Latin Grammar, section 145

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Possessive Pronouns.

145.

The Possessive pronouns are: -

FIRST PERSON. meus, my noster, our

SECOND PERSON. tuus, thy, your vester, your

THIRD PERSON. suus, his, her, its suus, their

These are really adjectives of the First and Second Declensions, and are so declined (see §§ 110 - 112). But meus has regularly mí (rarely meus) in the vocative singular masculine.

NOTE: Suus is used only as a reflexive, referring to the subject. For a possessive pronoun of the third person not referring to the subject, the genitive of a demonstrative must be used. Thus, patrem suum occídit, he killed his (own) father; but patrem eius occídit, he killed his (somebody else's) father.

a. Emphatic forms in -pte are found in the ablative singular: suópte.

b. A rare possessive cuius (quoius), -a, -um, whose, is formed from the genitive singular of the relative or interrogative pronoun (quí, quis). It may be either interrogative or relative in force according to its derivation, but is usually the former.

c. The reciprocals one another and each other are expressed by inter sé or alter ... alterum: -

alter alteríus óva frangit, they break each other's eggs (one ... of the other).
inter sé amant, they love one another (they love among themselves).

FIRST PERSON.	meus, my	noster, our
SECOND PERSON.	tuus, thy, your	vester, your
THIRD PERSON.	suus, his, her, its	suus, their