4. Nam said to me that he would give me his old iPod.

S + said + to O + (that) + S + V (lùi thì) + ....

5. Tom is my classmate

Classmate (n) : bạn cùng lớp

6. On hearing a whistle, the rescue workers quickly came to rescue the victims.

Sau giới từ + Ving ( on là giới từ )

7. Mary fell over, while we were running in the park

QKD, + while + QKTD ( sau while phải là một mệnh đề QKTD )

8. She was painting a picture, while her mother was making a cake

9. When she came yesterday, they were cooking

When + QKD, QKTD -> Diễn tả một hành động đang xảy ra thì một hành động khác xen vào.