EX20:

1. Why were you absent from his graduation party last Sunday?

be absent from: vắng mặt

2. The exam was not as difficult as we thought.

S + be(not) + as +ADJ + as + O: ss bằng

3. The visitor spoke too quickly for me to understand what he said.

S + V + too + ADV+ (for O) + to V: quá ... đến nỗi 

4. Our area will have a new school next year. 

S + will have + N 

5. It takes me 10 minutes to walk from my house to school.

It takes +O + time +to V : mất bao nhiêu thời gian để làm gì 

EX21:

1. In his free time, my father often plays badminton with his friends.

In one's free time: trong thời gian rảnh của ai 

S số ít + Vs/es: thì HTĐ

play with sb: chơi với ai 

2. My mother is a teacher. She teaches Math at a school near my house.

S +be + a/an +N số ít 

S số ít + Vs/es: thì HTĐ

3. My brother is 17 years old and he is in grade 12.

S  +be + tuổi + years old 

S + be+ in grade + khối 

`color{orange}{~MiaMB~}`