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`12,` Tom said that he was going away for a few days and he would phone me when he got back

- Lùi thì : HTTD -> QKTD ; will -> would ; HTĐ -> QKĐ

- Đổi ngôi : I -> he ; you -> me

`13,` Tom said that he hadn’t been at home the day before

- Lùi thì : QKĐ -> QKHT

- Đổi ngôi : I -> he

- Đổi thời gian : yesterday -> the day before

`14,` Mary said that she hadn’t gone to school the day before

- Lùi thì : QKĐ -> QKHT

- Đổi ngôi : I -> she

- Đổi thời gian : yesterday -> the day before

`15,` They said they would go to China the following week

- Lùi thì : will -> would

- Đổi ngôi : we -> they

- Đổi thời gian : next week -> the following week

`16,` My teacher said that the sun rises in the east

- Sự thật hiển nhiên -> Không lùi thì

`17,` She told us to make themselves at home

- Đổi ngôi : yourselves -> themselves

- GT – Mệnh lệnh : S + asked/told + O + to Vbare-inf …

`18,` She said she had to finish her homework then

- Lùi thì : must -> had to

- Đổi ngôi : I -> she ; my -> her

- Đổi thời gian : now -> then

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`@` GT - Câu kể : S + said/told + (that) + S + V(lùi thì/đổi ngôi)