Nếu tính từ là từ ngắn thì ta có công thức `:`

`(+)S_1+`is`/`am`/`are`(+`not nếu có`) +Adj-er+than+S_2` $\\$ Ví dụ `:` She is taller than her sister

`(+)S+`is`/`am`/`are`+the+Adj-est+` in/on/at `+` nơi chốn `/` địa điểm

Ví dụ `:` She is the fattest in her class

Nếu tính từ là từ dài thì ta có công thức `:`

`(+)S_1+`is/am/are`(+`not nếu có`) +`more`+Adj+than+S_2` $\\$ Ví dụ `:` He is more rich kid than his girlfriend

`(+)S_1+`is`/`am`/`are`+`more`+Adj+than+S_2` $\\$ Ví dụ `:` He is the most rich kid in his fanpage

Vậy áp dụng ta có kết quả `:`

`1.` The country is quiter than the city

`2.`  Minh's house is nearer to the town center

`3.` Which is the largest city in your country `?`

`4.` The math book is thicker than history book

`5.` London is safer than New York

`6.` Who is the oldest person in your family `?`

`7.` The country is cleaner than the city

`8.` Who is the richest person in the world `?`

`9.` His garden is larger than our

`10.` Her new hat is prettier than the old one

`11.` He is more clever than his brother

`12.` This box is heavier than that one

`13.` This lesson is more difficult than the last one