1.They will open a new school here next year.
 A new school will be opened here next year

->tân ngữ câu trên là chủ ngữ câu dưới->bị động 
2. She can’t go to work today because she is tired.
 If she weren't tired,she could go to work today

->câu đk 2 diễn tả hành động ko có thật ở hiện tại:if+S1+Ved/c2,S2+would/could+V
3. Please let me open the window.
 Would you mind opening the window?

->would you mind+Ving
4. “Why don’t we go and have a look at the cathedral?”
He suggested that we go and have a look at the cathedral

->S1+suggested+that+S2+(should)+(not)+V nguyên
5. The last time we met each other was ten years ago.
  We haven’t met each other for ten years

->the last time+S+Ved/c2....+was+time+ago = S+haven't/hasn't+Ved/c3....for+time
6. Leave now or we will miss the train.    
Unless we leave now,we will miss the train

->(S1)+V or+S+will+V = unless+S+V,S+will+V
7.You backpack is not the same as mine.
=> My backpack is different from yours

->different from:khác
9.How long have you studied medicine?
- When did you start studying medicine?

->how long have/has+S+Ved/c3...? = when did+S+start/begin +toV/Ving...?

 10. They bought this building two years ago.
This building was bought two years ago

->tân ngữ câu trên là chủ ngữ câu dưới->bị động 

${1.}$ A new school will be opened here next year.

→ bị động TLĐ: S + will (not) + be + v3/ed + (by+O) + time

${2.}$ If she weren't tired, she could go to work today.

→ câu ĐK loại 2 ( diễn tả 1 sự việc không thể xảy ra ở hiện tại hoặc tương lai ): If + S + QKĐ ( đối với Vbe thì ta dùng "were/weren't" cho mọi ngôi ), S + would/could (not) + V0

${3.}$ Would you mind opening the window?

→ Would you mind + V_ing: Bạn có phiền ... ?

${4.}$ He suggested going and having a look at the cathedral.

→ suggest +V_ing: đề nghị, gợi ý làm gì

${5.}$ We haven’t met each other for ten years.

→ S + have/ has +not+ V3/ed + for + khoảng thời gian: Ai đó đã không làm gì trong bao lâu

= The last time + S + V2/ed + was + time + ago.

${6.}$ Unless we leave now,we will miss the train

→ If not = Unless

* nếu câu này viết dưới điều kiện "if" thì câu sẽ là: If we don't leave now,we will miss the train.

* câu ĐK loại 1 ( diễn tả 1 sự việc có thể xảy ra ở hiện tại hoặc tương lai ): If + S + HTĐ, S + will/can (not) + V0

${7.}$ My backpack is different from yours.

→ S + Vbe + different from + S: khác với

${9.}$ When did you start studying medicine?

→ When did + S + start/begin + to_V/V_ing +O ?: Bắt đầu làm gì đó khi nào 

= How long + have/has + S + v3/ed + O?

${10.}$ This building was bought two years ago.

→ bị động QKĐ: S + was/wể (not) + be + v3/ed + (by+O) + time