1. It is said that he invented the digital camera. (Cấu trúc: People (they) + say (said) + that S2 V2 O2 ↔It + is / was + said + that S2 V2 O2)
2. I wish I knew more people. (Cấu trúc: S + wish (that)+ S + V2/ed / (be->were))
3. Many famous plays were written by Shakespeare. (Cấu trúc bị động thì quá khứ đơn)
4. This flower is watered by my father every morning. (Cấu trúc bị động thì hiện tại đơn)
