Раскрыть скобкиPeter...(talk) on the phone when I came

Peter was talking on the phone when I came. Когда я пришел, Питер собеседовал по телефону.
Peter wasnt talking on the phone when I came.
Was Peter talking on the phone when I came?
What was Peter doing when I came?
Who was talking on the phone when I came?

Was Peter talking on the phone or sleeping when I came?

Peter was talking on the phone when I came, wasnt he?

Past Continuous выражает деянье, на фоне которого произошло иное деянье, которое обязательно обязано быть выражено Past Simple.
В Past Continuous деянье носит долгий характер, а в Past Simple короткий нрав.