They think her dog was stolen yesterday.
-> It is thought that her dog was tolen yesterday.
- Cấu trúc: S1 + V1 + (that) + S2 + V2
-> It + be (chia theo thì V1) + Vpp (lấy từ V1 chuyển về cột 3) + (that) + S2 + V2
-> Her dog is thought to have been stolen yesterday.
- Cấu trúc: S1 + V1 + (that) + S2 + V2 ( vì vế thứ nhất xảy ra trước vế thứ hai nên ta dùng cấu trúc )
-> S2 + be (chia theo thì V1) + Vpp (lấy từ V1 chuyển về cột 3) + to have been + Vpp (lấy từ V2)
