Answer:
1. I was finishing my homework.
2. All the medicine was drunk by the cat.
3. The girls was ironing the clothes.
4. I was reading that book.
5. Zach was breaking another glass.
6. I was sending four letters.
7. Was the present received by you?
8. Was the invention accepted by you?
Step-by-step explanation:
And you do the rest just like that.