*Note: Sau after dùng QKHT
Trước before dùng QKHT
Hành động xảy ra trước dùng QKHT
Hành động xảy ra sau dùng QKĐ
1. They (go) home after they (finish) their study
→ went/ had finished
2. Yesterday when I (arrive) to the party, they (already go) home.
→ arrived/ had already gone
3. After the guests (leave) , she (go) back into the living-room and (switch) off the light.
→ had left/ went/switched
4. On arrival at home I (find) that she (just leave) just a few minutes before.
→ found/ had just left
5. Before he (go) to bed, he (do) his homework.
→ went/had done
6. When they (get) to the place, the man (die)
→ got/ had died
7. He (do) nothing before he (see) me.
→ had done/ saw
8. He (thank) me for what I (do) for him.
→ thanked/ had done
9. I (be) sorry that I (hurt) him.
→ was/had hurt
10. After they (go) , I (sit) down and (rest)
→ had gone/ sat/rested