1. He apologized for not keeping his promise.

- Apologize for ( not ) + V - ing: Xin lỗi đã không làm gì.

2. It was yesterday that the firefighter saved many lives from the fire.

- Câu chẻ nhấn mạnh chủ ngữ: It + be + S + that + S + V ( Chủ thể là vật ).

3. He was the best player to get the role.

- Rút gọn mệnh đề quan hệ với "to V":

-> Các từ so sánh nhất như: The first, the second, the third, the last, ... -> Lược bỏ đại từ quan hệ, V -> to V

4. It takes most of the students in our group 20 minutes to cycle from home to school.

- S + spend ( tùy thì ) + time + V - ing: Dành bao lâu để làm gì

- = It takes ( tùy thì ) + O + time + to V: Mất bao lâu để làm gì.

5. The world is facing many social issues nowadays; therefore, we need to work together to solve them.

- S + V + O; therefore, S + V: Vì vậy ...

1. He apologized for not keeping his promise.

S + apologized + for + Ving: xin lỗi 

2. It was yesterday that the firefighter saved many lives from the fire.

It + be + S/O/ADV Phrase .. + that / who / whom + S+  V : câu chẻ 

3. He was the best player to get the prize.

Rút gọn MĐQH --> to + V1 

4. It takes most of students in our groups 20 minutes to cycle from home to school. 

It takes + O + time + to V: mất bao nhiêu thời gian làm gì 

5. The work is facing many social issues nowadays. Therefore, we need to work together to solve them.

Clause; Therefore, clause: vì vậy 

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