[영어 패턴] So I was + G ~, when all of a sudden S + V

 

So I was + G ~, when all of a sudden S + V
~ 하고 있었는데 갑자기 ~ 한 일이 벌어졌어.

So we were traveling by bicycle, when all of a sudden it started to rain cats and dogs.
So I was just going to call him, when all of a sudden he popped up.
So I was giving a presentation, when all the sudden the light went out.