Công thức the sam as:1.S + V + the same + noun + as + noun/pronoun

2.S + to be + as + adj + as + noun/ pronoun/ clause.

S: chủ ngữ, adj: tính từ, noun: danh từ, pronoun: đại từ, clause: mệnh đề.

Cấu trúc as...as

S + to be + not + so/as + adj + as + noun/ pronoun/ clause.

Cấu trúc diffirent from:

S + to be + different from + noun/ pronoun.

Khi dùng as....as:

 S1+tobe+as+adj+as+S2

VD: Lan is as beautiful as Hoa

Khi dùng different from:

 S1+tobe+different from+S2

VD: This book is different from that one

Khi dùng the same as

 S1+tobe+the same as+S2

VD: This book is the same as that one

Khi dùng not as(so).....as

 S1+tobe +not+as (so)+adj+as+S2

  VD: Minh isn't so tall as Quang