142. The Personal pronouns are as follows.
1st person: ego I, nōs we
2nd person: tū you, vōs you (all)
The personal pronouns of the 3rd person—he, she, it, they—are wanting in Latin, a demonstrative being sometimes used instead.
143. Ego and tū are declined below.
a. The plural nōs is often used for the singular ego the plural vōs is never so used for the singular tū.
b. The forms nostrum, vestrum, etc., are used partitively.
ūnusquisque nostrum each one of us
vestrum omnium of all of you
Note— The forms of the genitive of the personal pronouns are really the genitives of the possessives.
meī, tuī, suī, nostri, vestrī (genitive singular neuter)
nostrum, vestrum (genitive plural masculine or neuter)
So in early and later Latin we find ūna vestrārum one of you (women).
c. The Genitives meī, tuī, suī, nostri, vestrī are chiefly used objectively (§ 347).
memor sīs nostrī be mindful of us (me)
mē tuī pudet I am ashamed of you
d. Emphatic forms of tū are tūte and tūtemet (tūtimet). The other cases of the personal pronouns, excepting the genitive plural, are made emphatic by adding -met.
Note— Early emphatic forms are mēpte and tēpte.
e. Reduplicated forms are found in the accusative and ablative singular.
f. The preposition cum (with) is joined enclitically with the ablative.
Tēcum loquitur. He talks with you.