261. The polluted environment makes birds leave their habitats and plants die.

−- make+ sb+ V ( nguyên mẫu): làm cho ai lfm gì

27. If Mr. Quang didn't worked in a noisy environment, his hearing wouldn't become worse.

−- Câu điều kiện loại 22: Hiện tại không có thật

++ If-clause: chia QKĐ

++ Main clause: would/ could/ should/ might+ ( not)+ V

- Câu phủ định ( thì QKĐ): S+ didn't+ V

28. By the time the film started, we had gone to the cinema.

- Cấu trúc: Ngay khi: By the time+ QKĐ, QKHT

- Câu khẳng định ( thì QKĐ): S+Ved/ V2

- Câu khẳng định ( thì QKHT): S+ had+ Vpp

29. Human life has been completely changed by science and technology.

- Câu bị động ( thì HTHT): S+ have/ has+ been+ Vpp+ [ by O]+...