`69,` Peter said to us that he had gone there the previous week with his secretary.

- Lùi thì : Quá Khứ Đơn -> Quá Khứ Hoàn Thành

- Lùi trạng từ : last week -> the previous week

- Đổi ngôi : I -> he , my -> his

`70,` The doctor said to Ann that she had to stay out of crowds until she stopped her coughing and sneezing.

- Lùi thì : must -> had to , HTĐ -> QKĐ

- Đổi ngôi : you -> she , your -> her 

`71,` Bill asked me what country I came from.

- Lùi thì : HTĐ -> QKĐ

- Đổi ngôi : you -> I

`72,` He asked her where she had spent her holiday the previous summer.

- Lùi thì : QKĐ -> QKHT

- Đổi ngôi : you -> she , your -> her

- Lùi trạng từ : last summer -> the previous summer 

`@` Câu tường thuật dạng câu kể : S + said (to O)/told O + (that) + S + V(lùi thì)

`@` Câu tường thuật dạng W.H-? : S + asked (O)/wondered/wanted to know + W.H + S + V(lùi thì)