I was shopping when …
I was watching TV when …
I was playing football when …
We were waiting for the lesson to start when …
I was eating a burger when …
I was talking on my phone when …
I was skiing when …
I was lying in bed when …
I was sitting on the bus when …
We were doing an exam when …
I was swimming in the sea when …
I was walking to school when …(complete the sentence)
