16. It is the most beautiful painting I've ever seen. -> I have never seen........

$16.$ I have never seen such a beautiful painting. / I have never seen a more beautiful painting than this.

-> It is + the + most + adj + N + S + have/ has + ever + V3/ed

=> S + have/ has + never + V3/ed + such + a/an + adj + N

=> S + have/ has + never + V3/ed + a more + adj + N + than this

- Tạm dịch: Tôi chưa bao giờ nhìn thấy một bức tranh đẹp như vậy. / Tôi chưa bao giờ thấy bức tranh nào đẹp hơn bức tranh này.