Ребят,помогите пожалуйста срочноооо.Объясните,по чему пишется пасть Симпл и паст

Ребят,помогите пожалуйста срочноооо.
Растолкуйте,по чему пишется пасть Симпл и паст кантиниус.
1)Were you watching the film when the phone rang
2)John saw a bright light as he was walking down the street
3)The baby wasnt sleeping when Grandpa arri. L
4) While was trawling on the bus to work he remembered that it was his wifes birthday
5)Were the children studying while their nanny was preparing dinner?
6)While you were out,the postman came and dalivered these letters.