Chuyển các câu sau thành câu chủ động hoặc bị động 1. They grow coffee in more than 50 countries around the world.  2. The book was bought yesterday.  3. Tim was invited to Kate's birthday party.  4. She feeds her dogs twice a day.  5. My keys were lost yesterday.  6. The photos were taken by my dad yesterday.  7. They don't open the bank during the weekend.  8. The letter was sent two days ago. 

Để chuyển từ câu bị động sang câu chủ động, ta chuyển chủ ngữ của câu bị động thành vị ngữ chủ thể và động từ của câu bị động thành động từ chủ động.

1. More than 50 countries around the world grow coffee.
2. Someone bought the book yesterday.
3. Kate invited Tim to her birthday party.
4. She feeds her dogs twice a day.
5. Someone lost my keys yesterday.
6. My dad took the photos yesterday.
7. They don't open the bank during the weekend.
8. Someone sent the letter two days ago.

Someone sent the letter two days ago.

The bank is not opened during the weekend.

My dad took the photos yesterday.

I lost my keys yesterday.