* Cấu trúc câu hỏi Wh-question 

Wh-word + be/aux + S + V...?

- What: cái gì 

- How many + N-số nhiều, đếm 

`3.` What is the longest vacation?

`4.` What do you usually do during my vacation?

`5.` How many hours does your mother work a day?

`6.` What is Mr. Robinson do?

`3.` What is the longest vacation ?

`4.` What do you usually do during your vacation ?

`5.` How many hours does your mother work a day ?

`6.` What does Mr. Robinson do ?

`-` cấu trúc của `-wh` question :

What + tobe/does/do + V/N.. + O ?

( Tương tự với từ để hỏi khác )

How many/much + N + tobe/does/do + S + O?

How often + do/does + S + V + O?

How long + do/ does + S + V + O

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