1. I was allowed to drive her car yesterday.
-> Câu bị động quá khứ đơn: S + was/were + Vpp
2. It took her 2 hours to write the letter.
-> It + takes/took + SO + thời gian + to V
3. I'd rather you didn't make any noise in class.
-> S + would rather + S2 + V2/ed