1. John said that he had finished studying his lesson.

2. Mary said to John that she could not go to the movies with him.

3. Mary said to her friend that she should expect to see her the next Wednesday.

4. She said that she had gone to the doctor the previous day.

5. He said that he had a toothache.

6. She said that she would write him a prescription.

7. They said that they were going to the drugstore.

8. He said that the doctor had given him some pills.

9. She said that she went to the supermarket every day.

10. He said that he had received the envelope.

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Giải thích:

+ Cấu trúc câu gián tiếp: S1+ said/ told+ (to O/ O)+ (that)+ S2+ V(lùi thì)....

+ yesterday-> the previous day

+ next day..-> the following day.../ the next day...