` HTTTD ` 

` ( + ) ` : S + be + V-ing

` ( - ) ` : S + be not + V-ing

`( ? ) ` : Be + S + V-ing 

` HTĐ ` Tobe

`  - `  I + am / am not

`  - `  He / she / it + is / isn't hoặc is + He / she / it 

` - ` You / we / they + are / aren't hoặc are + You / we / they

` IV `

` 1 ` , và ` 2 ` : Làm rồi

` 3 ` : What is she wearing ?  She is wearing a blue dress

` 4 `: Is your friend a boy or a girl ? My friend is a girl

3. What is she wearing?

She is wearing a blue dress.

công thức: 

wh + verb + (complement) + (modifier)

4. Is your friend a girl or a boy?

My friend is a girl.

Công thức:

 Is + S+ O?

Có thể công thức sẽ sai 😥😥