新概念2Lesson14.ppt

drank water had run out of breath 1. ran out of breath 2. drank water He had run out of breath before he drank water. After he had run out of breath, he drank water. ——————∣—————∣—————→∣——→ now 2. played ping pong 1. did his homework ——————∣—————∣—————→∣——→ now played ping pong had done his homework He had done his homework before he played ping pong. After he had done his homework , he played Ping pong. * Key structure 1 在复合句中，先发生的用过去完成时，后发生的用一般过去时。 The thieves ran away. The police arrived. →When the police arrived, the thieves had run away. The sun set. We returned to our hotel. →As soon as the sun had set we returned to our hotel. * 2 在能明显表明前后时间的句子里，过去完成时可以代替一般过去时, 表示强调。常用时间状语as soon as, after, before, when, until ,the moment）等。 试比较： After he had finished lunch, he asked for a glass of water. After he finished lunch, he asked for a glass of water. Key structure 常常用在以下结构中： when before after since by the time 等引导的时间状语从句中，发生在过去的两个动作，先发生的用过去完成时，后发生的用一般过去时。 或 by for, before since, by the end of till up to 过去时间点的句子中 + ● When I got to the station, the train had already left. ● They had already planted six hundred trees before last Wednesday. No sooner… than… Hardly/ Scarcely … when… 句型中 It was the first time that … 句型中 Hardly had I got home when it began to rain. No sooner had she gone than it happened. It was the first time that I had visited Beijing. Intend, hope, want, expect, think, mean, suppose, plan, intend 等动词的过去完成时表示本来打算做而未做的事。 We had hoped to catch the 9:30 train, but we failed to. They had expected to get what they needed, but there was nothing there. 主语+had + 动词的过去分词 (p.p.) 定义： 强调过去某一个动作发生在 另一个动作前常常用过去完成时态。 1.在老师进入教室前, 李磊擦了黑 板. LiLei ______________ (clean) the blackboard before the teacher came into the classroom. had cleaned 2. 当我们到那儿时火车已经离开了。 The train __________ (leave) when we arrived there. had left We use it