нужно поставить в вопросительную форму 3 придложения
1)My parents hsd seen that performance befor.
2)They had left for the airport before 5 o'clock.
3)You had fixed that camera by Tuesday

1) Had my parents seen that performance before? 2) Had they  left for the airport before 5 o'clock? 3) Had you fixed that camera by Tuesday?