`1`.There are 40 classrooms in Phong's school

`\rightarrow` Thì HTĐ ( ĐT Tobe ) : S + be + adj / n

`2`.Phuong is Nam's sister

`\rightarrow` Thì HTĐ ( ĐT Tobe ) : S + be + adj / n

`3`.The toystore is to the left of the bookstore

`\rightarrow` To the right / left of + N : Dùng để chỉ vị trí ở bên cạnh chỗ nào

`4`.Mobile phones are more expensive than computers

`\rightarrow` So sánh hơn : S1 + be + adj-er / more adj + than + S2

`\text{@ TheFox}`

1. There are forty classrooms in Phong school

--> There are + N/ adj ( HTĐ )

2. Phuong is the sister of Nam

--> S + tobe + noun ( HTĐ )

3. The toystore is to the left of the bookstore 

--> The + S + tobe + noun ( dựa vào nghĩa thoi )

4. Mobile phones are more expensive than computers

--) So sánh hơn ( S + tobe +more +  động từ 2 âm tiết trở lên + than + noun)