Вопросы:
when is your birthday?
when do you get up on Sundays?
when does you mum come home?
when do you turn sixteen?
when will you pass the test?
утвердительные предложения
I was reading a book when my mum came home.
when I came to the party, my friend had already gone.
when I arrived to the train station, the train had gone.
my parents were watching T.V when I called them my friend was writing an essay when his teacher said that the lesson was over.