Я живу в городе. (Ya zhivu v gorode.)
Here's a breakdown:
* Я (Ya) - I
* живу (zhivu) - live (present tense)
* в (v) - in
* городе (gorode) - city (masculine noun)
You can also be more specific and say:
* Я живу в большом городе. (Ya zhivu v bolshoom gorode.) - I live in a big city.
* Я живу в маленьком городе. (Ya zhivu v malen'kom gorode.) - I live in a small city.
Let me know if you need help with other Russian phrases!