Могу ошибиться.
1) My family and I was sleeping when our house started shaking.
2) While the ground was shaking, several things fell off our kitchen cabinets and bookshelves.
3) My bed was moving from side to side when the earthquake suddenly stopped.
4) Just as we were trying to recover from the shock, there was an aftershock.
5) As we were running for the door, a lamp crashed to the floor.
Объяснение:
Which was the longer action in each sentence?
В предложениях, где глагол с окончанием -ing, там и длинее.
Например, 1) My family and I was sleeping when our house started shaking.