`1.` Phong asked Peter if he enjoyed reading. 

`-` Thì HTD (enjoy = V-inf) `->` Thì QKD (enjoyed = V-ed) - lùi thì

`-` you `->` he (thay thế cho Peter) 

`-` enjoy doing sth: thích làm gì

`2.` Hoa asked Lan if she liked sports.

`-` Thì HTD (like = V-inf) `->` Thì QKD (liked = V-ed) - lùi thì

`3.` She asked Nam if his sister and brother went to the same school.

`-` Thì HTD `->` Thì QKD (go - went - gone)

`-` your `->` his (thay thế cho Nam - Nam's sister and brother)

`4.` She asked her mom if there were some oranges in the fridge. 

`-` Thì HTD (are) `->` Thì QKD (were)

`5.` He asked his friend if it would rain the following morning.

`-` Thì TLD (will + V-inf) `->` would + V-inf (lùi thì)

`-` tomorrow morning `->` the following morning

`7.` Tuan asked Lan if Tam and Hoa were late for class.

`8.` She asked me if I could speak Chinese.

`-` can `->` could (lùi DTKT)

`-` you `->` I (đổi chủ ngữ - đổi ngôi)

`9.` Tam asked Thu if she would be there for five days.

`-` Thì TLD (will + V-inf) `->` would + V-inf (lùi thì)

`-` here `->` there (đổi trạng từ chỉ thời gian)

`-` Câu tường thuật dạng Yes or No question

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