John sees them.The direct object pronouns in Spanish correspond to the six persons of the verb and are as
follows:
1st person sing. me me
2nd person sing. te you (familiar sing.)
3rd person sing. lo him/it/you (polite sing., masc.)
la her/it/you (polite sing., fem.)
1st person pl. nos us
2nd person pl. os you (familiar pl.)
3rd person pl. los them (masc. people or objects) or you (polite pl., masc.)
las them (fem. people or objects) or you (polite pl., fem.)
Direct object pronouns are generally placed before the verb, for example:
John sees me.
Juan me ve.
I see you. (familiar sing.)
(Yo) te veo.
We see him./We see it. (masc. sing.)/We see you. (polite sing. masc.)
Lo vemos.
They see her./We see it. (fem. sing.)/We see you. (polite sing. fem.)
La ven.
They see us.
Nos ven.
We see you. (familiar pl.)
Os vemos.
We see them. (masc.)/We see you. (polite pl. masc.)
Los vemos.
We see them. (fem.)/We see you. (polite pl. fem.)
Las vemos.Basic Spanish: A grammar and workbook 80