- THAY THẾ ĐỒ VẬT, LÀM CHỦ NGỮ /TÕN NGỮ TRONG MĐQH. EX

3. WHICH: - thay thế đồ vật, làm chủ ngữ /tõn ngữ trong MĐQH.

Ex: - She works for a company. It makes cars

 She works for a company which makes cars.

The accident wasn‘t very serious. Daniel saw it.

=> The accident which Daniel saw ……

* Th y thế cho cả mệnh đề đứng trước nú – a connector

Ex: He passed his exam. This pleased his parents.

He passed his exam, which pleased his parents. (dựng dấu phẩy trước đại từ quan hệ)