`@` Công thức HTĐ: 

`1`. Thể khẳng định ( Affirmative )

`(+)` S + Vs/es + ...

`→` Nếu là 'She/He/It' thì Verb thêm " s " hoặc " es "

`→` Nếu là 'I/We/You/They' thì Verb nguyên mẫu ( V_bare )

`2`. Thể phủ định ( Negative )

`(−)` S + don't/doesn't + V ( bare ) + ...

`−` I , You , We , They − Do 

`−` He , She , It − Does 

`3`. Thể nghi vấn:

`(?)` Do/does + S + V ( bare ) + ..

`−` Trạng từ nhận biết: always, usually, often, sometimes, never, every,...

`−` Chú ý : 

`−` She , he , it + Vs/es

`−` I , you , we , they , N and N + V.inf 

`---------------` 

`1`. Is there a TV in your room?

`2`. What is it?

`3`. What is Tom's father's occupation?

`4`. What do you love to do on the mountain?

`5`. What color and pattern is your bike?

`6`. Where are they from?

`7`. How old is Jereniy?

`8`. How do they go to school?

`9`. Who lives with you?

`10`. What were you doing all day yesterday?

`11`. Who can't you see outside?

`12`. What didn't you buy?

13. What did you forget to buy?

`color{green}{@ l y n n e } `