`1.` The doctor asked him if he slept at least eight hours a day.
- Câu hỏi dạng Yes or No question
- S +asked (+O) + if/whether + V lùi thì
- Thì HTD `->` Thì QKD
`2. `She said to her mother that she had got a very score in her last test.
- Câu tường thuật
- S + say/said/tell/told + (that) + S + V lùi thì
- Thì QKD `->` Thì QKHT