Ответ:
1. He swims well. (Present Simple)
He said that he swam well.
2. We wrote tests. (Past Simple)
We said that we had written.
3. She is reading. (Present Continuous)
She said that she was reading.
4. I have read this book. (Present Perfect)
I said that I had read.
5. They went to school. (Past Simple)
They said that they had gone to school.
6. We play tennis. (Present Simple)
We said that we played tennis.
7. She will go to the country. (Future Simple)
She said that she would go to the count.