It (rain) and the road was covered in water.
[ had been raining ]
I (work) all day, so I didn't want to go out.
[ had been working ]
It (snow) for three days.
had been snowing
We (eat) all day, so we felt a bit ill.
[ had been eating ]
We (go) out for three years when we got married.
[ had been going ]
They (wait) at the station for 90 minutes when the train finally arrived.
[ had been waiting ]
His face was red because he (run)
[ had been running ]