`1`. She said that she didn't buy that book.

- this `->` that

- Hiện tại đơn `->` quá khứ đơn

`2`. The boys said that they were playing sports then.

- we `->` they, now `->` then

- Hiện tại tiếp diễn `->` quá khứ tiếp diễn

`3`. Her classmate said that Lan was the most intelligent girl in their class.

- our class `->` their class

- Hiện tại đơn `->` quá khứ đơn

`4`. They said that their friends would get the award gor their highest scores.

- our friends `->` their friends 

- will `->` would

`5`. He said that he would go to school by bus the next day.

- I `->` he, tomorrow `->` the next day/ the following day

- will `->` would

* Cấu trúc: S1 + said + (that) + S2 + V lùi thì

`1)` She said she didn't buy that book.

`2)` The boys said they were playing sports then.

`3)` Her classmates said Lan was the most intelligent girl in their class.

`4)` They said their friends would get the award for their highest score.

`5)` He said he would go to school by bus the next day.