3.My school is bigger than my brother's school .

4. Living in the city is more exciting than living in the countryside .

5. Peter's exam results is worse than Nick 's exam results .

Công thức : S+ tobe + tính từ ngắn thêm er + than + S 

S+tobe + more + tính từ dài + than + S 

@Chaeyoung 

1,My school is bigger than my brother's school .

2, Living in the city is more exciting than living in the countryside .

3, Peter's exam results is worse than Nick 's exam results .

   Công thức : S+ tobe + tính từ ngắn thêm er + than + S 

   S+tobe + more + tính từ dài + than + S