Questions & Answers about Ο φίλος μου μένει σε άλλη πόλη.
Ο is the masculine singular definite article in the nominative case (the “dictionary form” for subjects).
- φίλος (friend) is a masculine noun.
- It is the subject of the sentence (“the one who lives”), so it must be in the nominative case.
- Therefore it takes the article ο → ο φίλος = the friend.
If the noun were feminine, you would see η (e.g. η πόλη = the city), and if it were neuter, το (e.g. το παιδί = the child).
In Greek, the unstressed possessive pronoun (my, your, his, etc.) usually comes after the noun:
- ο φίλος μου = my friend
- literally: the friend my
So:
- ο φίλος μου = my friend
- η μητέρα μου = my mother
- το σπίτι μου = my house
You can use a stressed form δικός μου before or after the noun for emphasis (e.g. ο δικός μου φίλος = my friend, in contrast to someone else’s), but the normal, neutral way is noun + μου.