- Struc: It + tobe + necessary + (for sb) + to_V + O 

`=` S + has/have + to + Vo + O
-> cần thiết cho ai để làm gì

ex: 

`-` It is necessary for all of us to learn English well

`=` We have to learn English well

`-` It is necessary for you to finish this work today

`=` You have to finish this work today

Đáp án + Các bước giải thích :  

- Cấu trúc :  

 It is necessary for + S +  to do something

⇒ S + Have / has  to + V-0

- Ví dụ : 

1. It is necessary for you to listen to the teacher ⇔ You have to listen to the teacher 

- Dịch : Bạn cần phải lắng nghe giáo viên 

2. It is necessary for Trang to pass the exam ⇔ Trang has to pass the exam

- Dịch : Trang cần đậu bài thi