1 he swims like a fish 

-> thì HTĐ

-> ta có cấu trúc :

Cấu trúc động từ tobe : 

S + be + ... 

Cấu trúc động từ thường 

S + v hoặc v s/es + V nguyên mẫu

2 Your weight is not the same as his

-> so sánh bằng : the same as

3 is mai as beautufull as her sister ? 

-> so sánh bằng dạng nghi vấn

4 we went to the same school when we were young 

-> thì QKĐ 

5 school IN USA are diffrent from those in VN 

-> diffrent from : khác nhau 

6 Tam and Nam are similar in height

$\textit{1 .He swims like a fish}$

$\textit{2.Your weight isn't the same as his.}$

$\textit{3.Is Mai as beautifully as her}$ sister? $\textit{4.We used to go the the same school when we were young.}$

$\textit{5.Schools in the USA are a little different from schools in VN.}$

$\textit{6.Tam and Nam are the similar height.}$

$\textit{Cấu trúc : S + V(s/es / tobe) + the same + as + S}$

$S + $ $used to$ +$Vinf ...$

$\textit{S (số nhiều) + tobe + the same (similar) + Tính từ}$