16. They intend to make this beach a clean and beautiful place again.
They plan……………………………………………………………………..
17. The students started to collect old clothes for their charity programme last week.
The students have...…………………………………………………………..
18. If I don't leave now, I'll miss my train.
Unless I leave …………………………………………………………………..
19. Students at our school do a lot of outdoor activities.
Students at our school take………………………………………………………
20. Phuc is the most intelligent student in the class.
No student ………………………………………………………………………

`16.` They plan to make this beach a clean and beautiful place again.

`-` intend to V-inf `=` plan to V-inf : định làm gì

`17.` The students have collected old clothes for their charity programe since last week.

`-` S + started + to V-inf + ... + time ago

`=` S + have/has + V-ed/c3 + ... + since/for time

`18.` Unless I leave now , I'll miss my train.

`-` If + phủ định `=` Unless + khẳng định.

`19.` Students at our school take part in a lot of outdoor activities.

`-` take part in sth : tham gia vào cái gì

`20.` No student in the class is as intelligent as Phuc.

`-` So sánh nhất TT dài : S + tobe + the most + adj + ...

`-` So sánh ngang bằng : S1 + tobe + as + adj + as + S2

`16,` They plan to make this beach a clean and beautiful place again

- intend to do sth = plan to do sth : dự định làm gì

`17,` The students have collected old clothes for their charity programme since last week

- S + started/began + V-ing/to V + ... + t/gian + ago

= S + have/has + P2 + ... + for/since + t/gian

`18,` Unless I leave now, I will miss my train

- ĐK loại `1` : If + S + V(htđ), S + will/can/shall + Vbare-inf ...

- Điều kiện có thể xảy ra ở hiện tại hoặc tương lai

- Unless = If ... not

`19,` Students at our school take part in outdoor activities

- take part in (phr.v) : tham giao vào

`20,` No student in the class is more intelligent than Phuc

- SSN - Tính từ dài : S + be + the + most adj + (N) ...

- SSH - Tính từ dài : S1 + be + more adj + than + S2