1. It’s no good worrying for him because he can manage the situation. @There’s no point _________________________________________________. 2. It is the first time we have eaten Korean food. @We haven’t ______________________________________________________. 3. No one in our class can play football as well as Phong. @Phong is the _____________________________________________________. 5. My sister is cooking and I am watching TV. @While _________________________________________________________. 6. If there isn’t enough rain, the hydropower station cannot operate. @Unless ________________________________________________________ 7. He didn’t receive my letter. I sent him the letter last January. @He didn’t _______________________________________________________.

1. There 's no point in worrying for him because he can manage the situation.

2. We haven't eaten Korean food before

3. Phong is the best footballer in our class

5. While my sister was cooking, I was watching TV.

6. Unless there is enough rain, the hydropower station cannot operate. 

7. He didn't receive my letter which I sent him last January

If .... not = Unless : trừ khi

There is no point in + V-ing: Không có lý nào

While thường được sử dụng để nói về hai hành động đang diễn ra và kéo dài tại cùng 1 thời điểm.

While+ subject + verb

Cách dùng mệnh đề Which :

+) làm chủ từ hoặc túc từ trong mệnh đề quan hệ

+) thay thế cho danh từ chỉ vật

….N (thing) + WHICH + V + O

….N (thing) + WHICH + S + V

Công thức so sánh nhất với short adj: S + to be + the + adj + est + Noun/ Pronoun

good/well->better->best

It is the first time + S + have/has + V3/ed = S + has/ have not + V3/ed + before