`=>` The girl asked the boy if he knew the way to the national park in that area. 

`-` Câu tường thuật dạng Yes or No questions

`->` Cấu trúc: S + asked (sb)/wanted to know/... + if/whether + S + V lùi thì

`-` "Do you know" `->` Thì HTD `->` Lùi thì: Thì QKD (S + V-ed/V2+ O)

`-` this `->` that (đổi trạng từ chỉ nơi chốn)

`-` know - knew - known 

The girl said to the boy:''Do you know the way to the national park in this area?''

`=>` The girl asked the boy if he knew the way to the national park in that area

`@` Kiến thức :

`-` Nghi vấn : S + asked/ wanted to know/ wondered + if/whether + S + V ( đổi ngôi / lùi thì )

`-` HTĐ `->` QKĐ

`-` this `->` that