`12,` The identity of the murderer is not revealed until the very last page. `->`Not until _____________________________________________________ . `13,` As soon as Sakkari had won the tournament, she announced her retirement. `->`No sooner ___________________________________________________ .

12. Not until the very last page is the identity of the murderer revealed

`-` Not until`+`time/N`+`trợ ĐT`+`S`+`V`+`O

`-` Dịch : Đến trang cuối cùng, danh tính của kẻ sát nhân mới được tiết lộ

13. No sooner had Sakkari had won the tournament than she announced her retirement.

`-` No sooner`+`had`+`Ved/PP`+`than`+`$V_{2}/ed$ `+`O

`-` Dịch : Ngay sau khi Sakkari vô địch giải đấu, cô ấy đã tuyên bố giải nghệ

=>

12. Not until the very last page is the identity of the murderer revealed.

13. No sooner had Sakkari won the tournament than she announced her retirement.

Not until ~ mãi cho đến khi

đảo ngữ no sooner had S V3/ed than S V2/ed