Ms Yen asked Lan if/whether she had done her homework the day before.

- Cấu trúc chung( Yes- No question):

$\text{S+ asked+ O+ if/whether+ S+ V(lùi thì)}$

+ you => her

+ your homework => her homework

+ Quá khứ đơn => Quá khứ hoàn thành

+ yesterday => the previous day/ the day before.

$\text{# L}$

`->` Ms Yen asked Lan if she had done her homework the previous day

`=>` Câu tường thuật dạng Yes/No - questions

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

`=>` you `->` she

`=>` your `->` her

`=>` Thì QKĐ `->` Thì QKHT

`=>` yesterday `->` the previous day