Công thức thì HTĐ (V: tobe)

(+) S + am/is/are ..

(-) S + am/is/are + not .. 

(?) Am/Is/Are + S + ... ? 

⇒ Yes, S + am/is/are

⇒ No, S + am/is/are + not 

I + am

S số ít, he, she, it + is

S số nhiều, you ,we, they + are

----------------------------------------------------

a/an + N số ít, đếm được

a dùng khi có phụ âm đứng đầu

an dùng khi có nguyên âm UEOAI đứng đầu

----------------------------------------------------

3. 

- Is she a teacher?

- No, she isn't.

- She is a doctor

4. 

- Are they pencils?

- No, they aren't.

- They are erasers.

5. 

- Is it an apple?

- No, it isn't.

- It is an onion.

6.

- Are they cats?

- Yes, they are.

`color{orange}{~MiaMB~}`

`3.` Teacher

`-` Is she a teacher?

`-` No, she isn't

`-` She is a doctor

`4.` Pencils

`-` Are they pencils?

`-` No, they aren't

`-` They are erasers

`5.` Apple

`-` Is it an apple?

`-` No, It isn't

`-` It's an onion

`6.` Cats

`-` Are they cats?

`-` Yes, they are

`***` Cấu trúc thì hiện tại đơn dạng nghi vấn:

Am/ Are/ Is (not) `+` `S` `+` `N``/``Adj`?

`+` Yes, `S` `+` am/ are/ is

`+` No, `S` `+` am not/ aren’t/ isn’t

$\color{#990000}{\text{『L}}$$\color{#880000}{\text{e}}$$\color{#770000}{\text{v}}$$\color{#AA0000}{\text{i』}}$