`\text{Answer :}` John asked Lan if she could speak English

`->` Tường thuật NV `-` Yes / No question :

`=>` S + asked + O + if / whether + S + V ( lùi thì )

`->` Can `->` Could

`->` `T`ranslate : `J`ohn hỏi Lan rằng cô ấy có thể nói tiếng Anh không `?`

`\text{# TF}`

-> John asked Lan if she could speak English

- Gián tiếp Yes / No question: S + asked + O + if / whether + S + V

-  Can -> Could

- You -> He / She