`color{red}{#Atr}`

`21.` He asked Nam when he would come to America.

`-` Lùi thì: will `->` would

`-` Đổi ngôi: you `->` he

`22.` My students asked me if UFOs were from another planet.

`-` Lùi thì: HTĐ `->` QKĐ

`23.` He asked me if the scientists could find any living creatures on the Moon.

`-` Lùi thì: can `->` could

`24.` He asked his daughter where she had gone the day before.

`-` Lùi thì: QKĐ `->` QKHT

`-` Đổi ngôi: you `->` she

`-` Đổi trạng từ chỉ thời gian: yesterday `->` the day before

`25.` Lisa asked her mother if she liked swimming.

`-` Lùi thì: HTĐ `->` QKĐ

`-` Đổi ngôi: you `->` she

`@` Câu gián tiếp của câu hỏi

`1.` Wh-questions: S + asked (+ O)/wanted to know/wondered + Wh- + S + V (lùi thì)

`2.` Yes-No questions: S + asked (+ O)/wanted to know/wondered + if/whether + S + V (lùi thì)

Câu tường thuật - dạng Yes/No-questions 

S + asked / wanted to know / wondered + (O) +if/whether + S+ V (lùi thì)

Câu tường thuật - dạng Wh-questions 

S + asked / wanted to know / wondered + (O) +WH + S+ V (lùi thì)

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will ⇒ would 

HTD ⇒ QKD

can ⇒ could 

QKD ⇒ QKHT / QKD 

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yesterday ⇒ the day before / the previous day 

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21. He asked Nam when he would come to America.

22. My students asked me if UFOs were from another planet.

23. He asked if the scientists could find any living creatures on the Moon.

24. He asked his daughter where she had gone the day before.

25. Lisa asked her mother if she liked swimming.

`color{orange}{~MiaMB~}`