it began to rain
Apenas habíamos empezado cuando comenzó a llover.
We had barely started when it began to rain.
Tan pronto como llegamos a la estación comenzó a llover.
As soon as we arrived at the station it started to rain.
Comenzó a llover cuando estábamos cambiando el neumático del coche.
It started to rain when we were changing the car tire.
To make matters worse, it started to rain.
Suddenly, it started to rain.
Ese día hizo frío, además comenzó a llover.
That day it was cold, and it also started to rain.
Comenzó a llover justo cuando yo salía de casa.
It started to rain just as I was leaving the house.
Suddenly it started to rain.
Poco después comenzó a llover.
It started to rain shortly afterwards.
It started to rain cats and dogs.