was going to

UPDATED: NOV 2021

was going to + verb + but

Someone was going to do something but didn't.

was going to + verb + but

EXAMPLES

I was going to walk to the supermarket, but it started raining.
Bill was going to buy the car, but changed my mind.
She was going to go to Paris, but got sick.
They were going to go to the movie, but it rained.
I was going to study English at Berkeley, but changed my mind and went to San Diego instead.