1. This novel is so long that I can't take several weeks to read.

→ S + be + so + adj + that + S + can't/couldn't + V.

2. When did he learn English?

→ Chuyển sang dạng quá khứ đơn.

3. I study English so as to improve my knowledge.

→ S + V + so as to + Vinf…

4. A bunch of flower has been given for her.

→ Câu bị động hiện tại hoàn thành.

5.  Is this the first time you have gone to school late ? 

→ Is this the first time + S + have/has + V3 ? 

6. He was delighted that his aunt sent him a letter.

→ S + be + delighted + (that) + N clause.

7. Chris asked Mary if she realized what the time was.

→ Câu tường thuật với câu hỏi yes/no.

8. Lan didn't remember her birthay and neither did I..

→ Cấu trúc so/too, neither/either.

9. He prefers playing football to playing tennis.

→ S + prefer + smt/ doing smt + to + smt/ doing smt.

10. Because Mai was careless, she broke the cup.

→ Because  + S + V + O, S + V + O.

Good luck!