$\text{17.}$ younger

$\text{→}$ có than ⇒ so sánh hơn

$\text{18.}$ smaller

$\text{→}$ có than ⇒ so sánh hơn

$\text{19.}$ taller

$\text{→}$ có than ⇒ so sánh hơn

$\text{20.}$ thicker

$\text{→}$ có than ⇒ so sánh hơn

III.

$\text{1.}$ My school is bigger than your school.

$\text{2.}$ Lan is younger than Hoa.

$\text{3.}$ My father is older than my mother.

$\text{4.}$ This ruler is longer than that ruler.

$\text{5.}$ This room is larger than my room.

$\text{6.}$ The boys are stronger than the girls.

$\text{7.}$ My house is taller than your house.

$\text{8.}$ Nam is shorter than his sister.

$\text{9.}$ Lan is taller than Hoa.

$\text{10.}$ I am bigger than my sister.

I.

$\text{1.}$ highest

$\text{→}$ có the ⇒ so sánh nhất

$\text{2.}$ shortest

$\text{→}$ có the ⇒ so sánh nhất

$\text{3.}$ deepest 

$\text{→}$ có the ⇒ so sánh nhất

II.

17.is younger

18.is taller

19.thicker

III.

1.My school is bigger than your school.

2.Lan is younger than Hoa.

3.My father is older than my mother.

4.This ruler is longer than that ruler.

5.This room is larger than my room.

6.The boys are stronger than the girls.

7.My house is taller than your house.

8.Nam is shorter than his sister.

9.Lan is taller than Hoa.

10.I am bigger than my sister.

Bài tập so sánh nhất.

1.highest

2.shortest

3.deepest

Cấu trúc so sánh hơn.

1.S1 + to be + adj + er + than + S2(tính từ ngắn)

2.S1 + to be +more +adj + than + S2 (tính từ dài)