1. Mr.Tan asked Tuan if he walked everyday.
2. Lan asked Hoa how she felt.
3. The teacher asked her students what the essential conditions for human life were
4. amuel asked the scientist whether humans had been able to communicate with people on other planets.
Cấu trúc: Tường thuật nghi vấn ( report questions)
HTD -> QKD: S + V_ ed / V2  - S + was/ were + adj + object.
HTHT -> QKHT: S + had + V3 / PII ( phân từ 2).

`1.`

* Sửa đề : Mr Tan asked Tuan "Do you go for a walk every day ?"

`->`Answer : Mr Tan asked Tuan if he went for a walk every day.

`-`you `->`he ( Đổi ngôi )

`-`go `->`went ( Lùi thì )

`2.`Lan asked Hoa how she felt.

`-`you `->`she ( Đổi ngôi )

`-`do...feel `->`felt ( Lùi thì )

`3.`The teacher asked her students what the essential conditions for human life were.

`-`are `->`were ( Lùi thì )

`4.`Samuel asked the scientist if humans had been able to communicate with people on other planets.

`-`have...been able to `->`had been able to ( Hiện tại hoàn thành `->`Quá khứ hoàn thành )

`=>`Cấu trúc câu gián tiếp với câu hỏi có từ để hỏi Wh/How-Questions : S + asked/ wondered/ wanted to know + Wh/How-Questions + S + V lùi thì

`=>`Cấu trúc câu gián tiếp với câu hỏi Yes/No : S + asked +(O)/wanted to know/ wondered + if/whether + S + V lùi thì