`***` Câu tường thuật gián tiếp với Yes/No ques-:

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

`-------------`

`1.` She asked him if he had worked before.

`-` Lùi thì: HTHT `->` QKHT

`-` Đổi ngôi: you `->` he

`2.` She asked him if he could work on Saturday before.

`-` Lùi thì: can `->` could

`-` Đổi ngôi: you `->` he

`3.` She asked if she might open the window.

`-` Lùi thì: may `->` might

`-` Đổi ngôi: I `->` she

`4.` She asked her boss if it would be alright if she had the day off.

`***` Câu trực tiếp trong câu `4` là câu điều kiện loại `2`, khi chuyển sang câu gián tiếp, không lùi thì.

`-` Đổi ngôi: I `->` she

Gián tiếp ''Yes/No'' : S `+` asked `+` O `+` if/whether `+` S `+` V(lùi thì) `+` O .

Gián tiếp Wh-questions : S `+` asked `+` O(sb) `+` Wh-question (who, what, when, where, how, why …) `+`V

`1.` She asked if I had worked before.

`2.` She asked if I worked on Saturday before.

`3.` She asked if she could open the window.

`4.` She asked her boss where it would be alright if she had the day off.