¿Cuándo usamos cada una?
Ejemplos:
I live in Barcelona.
I'm in the kitchen.
I was born in 1999.
We're in Autumn.
I wake up in the morning.
I was born on the 3th of February.
I saw it on TV.
She is on the first floor.
They'll arrive at five o'clock.
We see our family at Christmas.
I'll be waiting for you at the train station.
