Page6 Ex.3 Which action happened first?1. Pliny wrote about a devastating volcanic eruption that he had witnessed a s a young man.2. Before the eruption occurred, Pompeii had been a thriving Roman city…3. The bodies of people had decayed many centuries before archaeologists arrived.4. But these bodies had left an impression in the ash that showed exact shapes.1111*Which tense is used to talk about?*Which tense is used to talk about?1 an event in the past?2 an event that happened earlier, before the other past event in the story?Past simplePast simplePast PerfectPast Perfect** 在他们到达旅馆之前，他们已经吃早饭了。 在他们到达旅馆之前，他们已经吃早饭了。 They They hadhad already already hadhad breakfast before breakfast before they arrived at the hotel.they arrived at the hotel. ** 当警察到达的时候当警察到达的时候 ,, 那些贼已经逃跑了。 那些贼已经逃跑了。 When the police arrived, the thieves When the police arrived, the thieves hadhad already already runrun away.away. ** 今天上午今天上午 1010 ：： 0000 点以前，我已经写完了我的作文。 点以前，我已经写完了我的作文。 I I had finishedhad finished writing my composition writing my composition by 10:00 this morning. by 10:00 this morning. 翻译以下句子 :Past Perfect: 过去完成时We use Past perfect to talk about an event or situation in the past which happened before other past event.** 过去完成时表达 “过去的过去”过去完成时表达 “过去的过去” ,, 强调在过去强调在过去某某 一动作之前发生的动作。一动作之前发生的动作。1. 形式：主语主语 +had + done+had + done** 他记得他还没有付那支笔的钱。 他记得他还没有付那支笔的钱。 He remembered that he He remembered that he hadn’t paidhadn’t paidfor that pen.for that pen.2. 否定：had not + donehad not + done** 他说他以前从来没有看过这样美丽的鸟。 他说他以前从来没有看过这样...
