1. She said she had been on the beach the day before.
2. Do you mind sending me a letter?
3. He needs to wear goggles when swimming.
4. Before he left his office, he had closed the door.
5. Before they went home, they had evacuated the victims to safe shelter.
6. How long have you been learning English?
1 She said she had been on the beach the day before
đổi ngôi: I => she
lùi thì: quá khứ đơn was => quá khứ hoàn thành had been
hay đổi đại từ chỉ tgian: yesterday => the day before
2 Do you mind sending me a letter?
Would/Do you mind + Ving
3 He need to wear goggles when swimming
necessary => need to
4 Before he left his office, he had closed the door
5 Before they went home, they had evacuated the victims to safe shelter
6 How long have you learned English?
