Ответ:

1) had finished

2) Had broken

3) had closed

4)I had forgeted          

5)had stopped

6)had`t changed      

7) had`t made

8) had bought

9)had read

10)had`t flown

11) had`t started

12) Had your brother eaten

Объяснение:

I / She / He / It  + had + V3

чтобы задать вопрос глагол должен быть перед подлежащим тоесть

Had + I / She / He / It + V3