`46`. If I had had enough money, I would have bought that laptop.
`->` If 3: If + S1 + had + Vpp, S2 + would/could + have + Vpp
`47`. She said that she had to study hard for her next examination.
`->` Câu trần thuật chuyển "must" thành "had to"
`48`. You won't be allowed to go in the house.
`->` allow + SO + to V: cho phép ai đó làm gì
`49`. The man who is standing over there is my uncle.
`->` "who" thay cho chủ ngữ chỉ người trong mệnh đề quan hệ
`50`. Their exercises weren't finished on time.
`->` Câu bị động quá khứ đơn: S + was/were + Vpp
