1. “Sally doesn’t like horror films.”
doesn’t like → didn’t like (lùi thì)
Không cần đổi đại từ
=>  Arthur said (that) Sally didn’t like horror films.
2. “Mary doesn’t go to school on foot.”
doesn’t go → didn’t go
=> She said (that) Mary didn’t go to school on foot.
3. “Rich isn’t watching TV.”
is watching (hiện tại tiếp diễn)
→ was watching (quá khứ tiếp diễn)
phủ định → wasn’t watching
=> She said (that) Rich wasn’t watching TV.
4. “The fireplace isn’t working properly.”
isn’t working → wasn’t working
=> She said (that) the fireplace wasn’t working properly.
5. “John doesn’t take a bath every day.”
doesn’t take → didn’t take
=> Martha said (that) John didn’t take a bath every day.
6. “He doesn’t enjoy being alone.”
doesn’t enjoy → didn’t enjoy
=> She said (that) he didn’t enjoy being alone.
7. “My cousin Peter doesn’t speak Spanish.”
doesn’t speak → didn’t speak
my → her (vì người nói là “she”)
=> She said (that) her cousin Peter didn’t speak Spanish.
8. “They don’t understand their parents.”
don’t understand → didn’t understand
their vẫn giữ nguyên (vì vẫn là “họ”)
=> She said (that) they didn’t understand their parents.