Ex2 1.Listen! Someone knocks at the front door. 2. I am looking forward to go to Sam Son beach this weekend. 3. What did your child do when you came home yesterday? 4. The film was interesting for us seeing. 5 .My mother was make a big cake on my last birthday. 6. They has bought a new computer recently. 7 .My mother writed a letter to my grandmother last night. 8. They repaired my computer recently. 9. The teacher advised the students should practice speaking English more. 10. The tree planted here when I was 5 years old. 11. Hoa lived in Hanoi since she was in grade 6. 12. My sister enjoys to read in her free time.

1.Listen! Someone  knocks at the front door.=> are knocking
2. I am looking forward to go to Sam Son beach this weekend.=> going ( look forward to ving )
3. What did your child do when you came home yesterday? => was your child doing
4. The film was interesting for us seeing.  => to see
5 .My mother was make a big cake on my last birthday.=> made
6. They has bought a new computer recently.=> have
7 .My mother writed a letter to my grandmother last night ( qk đơn ) .=> wrote
8. They repaired my computer recently.( hiện tại hoàn thành )=> have repaired
9. The teacher advised the students should practice speaking English more.=> to  ( advise sb to v )
10. The tree planted here when I was ( qk ) 5 years old.=> was planted
11. Hoa lived in Hanoi since ( hiện tại hoàn thành ) she was in grade 6.=> has lived
12. My sister enjoys to read in her free time=> reading ( enjoy ving)