past countinuous and simple past

past continuous:

1- While I was walking near the street , a car had an accident.
2- While I was watching TV, the telephone rang.
3- While I was swimming , I saw afish.
4- While I was shopping , Imet my friend.
5- While I was playing football, My friend called me.

Simple past:

1- Iwent to the school yesterday.
2-He went to the super market last week.
3- They played football yesterday.
4- I played tennis yesterday.