`\color{#B9D3EE}{\text{#}}\color{#9FB6CD}{\text{Y}}\color{#6C7B8D}{\text{u}}\color{#696969}{text{u}}\color{#828282}{\text{k}}\color{#b5b5b5}{\text{a}\color{#B9D3EE}{\text{i}}\color{#9C9C9C}`

`(1)` Who cooks this perfect dish?

`⇒` My mother.

`(2)` Who is he?

`⇒` He is my brother.

`(3)` Who did you go out with all yesterday?

`⇒` I went with Nam.

`!` Form : Who `+` V `+` O.

`+` Who are you`?`

`-` Bạn là ai`?`

`-` I am GI

`+` Who is he`?`

`-` Anh ấy là ai`?`

`-` He is my brother

`+` Who are they

`-` Họ là ai `?`

`-` They are my parents 

Who `+` `(`Model V/ Aux verb`)` `+` V `+` O?