DE LUGAR = EN DONDE
In = en, dentro de (punto o área extendida pero cerrada)
I lived in Washington D.C. many years
At = en, junto a , a (punto preciso)
She is at home
On = en, sobre, encima de
The plates are on the table
Near = cerca de
The pharmacy is near the station
Close to = cerca de
The police station is close to the library
Next to = junto a
I live next to the supermarket
Opposite = frente a
The school is opposite of my house
At the end of =al final de
The church is at the end of this road
DE TIEMPO = CUANDO
On = en, el
On Monday
In = en, por
In the morning
In the afternoon
At = a (las), por
At nine o'clock
At night