Passe as frases a seguir para a forma negativa e interrogativa...

Passe as frases a seguir para a forma negativa e interrogativa do past perfect: ● When I got home, my sister had left.
● They had never been on an airplane before that trip.
● By the time I arrived at school, my teacher had left.
● I have been in that country before you know me.
● I had read his book last week.
● You had danced before the end of the game.
● They had finished your work last month.
● He had slept before the game starts.