6.OKD that QKHI Exercise 1 The past perfect tense: 1. Yesterday they (go) __ home after they (finish) __ their work. 2. When we came to the stadium, the match (already start) 3. Many people (move) __ to the new place before the storm occurred. __ 4. I sat down ant rested after they (go) __ 5. Before he died, he (be) __ ill for several days. 6. Last night before he (watch) __ TV, he (do) __ the exercise. 7. She went to the department after her (clean) __ the floor. 8 When I got to the party, they (go) __ home. 9. By the time the police arrived, the house (be) __ burned down. 10. By last year, twenty schools in this province (be) __ built.

<div class="content-answer-1 enable-event-click" style="overflow-x:auto;text-justify:inter-word;text-align:justify"><p>1. went / <span>had finished</span></p><br /><p><span>- QKĐ after QKHT</span></p><br /><p><span>2. had already started</span></p><br /><p><span>- When QKĐ , QKHT</span></p><br /><p><span>3. had moved</span></p><br /><p><span>- QKHT before QKĐ</span></p><br /><p><span>4. had gone</span></p><br /><p><span>- QKĐ after QKHT</span></p><br /><p><span>5. had been</span></p><br /><p><span>- Before QKĐ , QKHT</span></p><br /><p><span>6. watched / had done</span></p><br /><p><span>- Before QKĐ , QKHT</span></p><br /><p><span>7. had cleaned</span></p><br /><p><span>- QKĐ after QKHT</span></p><br /><p><span>8. had gone</span></p><br /><p><span>- When QKĐ , QKHT</span></p><br /><p>9. had been</p><br /><p>10. had been</p><br /><p>→ <span>Thì quá khứ hoàn thành (past perfect) : S + had + PII + O</span></p><br /><p></p></div><div class="pt12"><div></div></div>