(
课件网) UNIT 3 FOOD AND CULTURE Discover Useful Structures Learning Objectives To learn to use the past perfect tense and the past perfect passive voice. To make sentences using the past perfect tense and the past perfect passive voice. Lead in 动词的变体 三人称单数 过去式 现在分词 原形 过去分词 does做 did做 doing做 do做 done做 eats吃 ate吃 eating吃 eat吃 eaten吃 1. I _____ my homework every day. 我每天做作业。 2. I _____ my homework yesterday. 我昨天做了作业。 3. I _____ my homework now. 我现在正在做作业。 do 时态：一般现在时 结构：动词原形/ 三人称单数 did 时态：一般过去时 结构：动词过去式 am doing 时态：现在进行时 结构：am/ is/ are +动词ing 4. I _____ my homework tomorrow. 我明天要做作业。 5. I _____ my my homework now. 我现在已经完成了作业。 6. I _____ my homework before five o’clock yesterday. 在昨天5点钟前，我已经做了作业。 will do 时态：一般将来时 结构：will/ shall/ be going to +动词原形 had done 时态：过去完成时 结构：had+动词过去分词 时态：现在完成时 结构：have/ has +动词过去分词 have done Q1：什么是过去完成时？ Q2：过去完成时的结构？ Q3：过去完成时时间状语有哪些？ Q4：隐形的过去完成时 一、过去完成时 Q1：什么是过去完成时？ By the time the policeman got to the shop, the thief had run away. 警察到商店时，小偷已经逃跑了。 过去 现在 将来 过去完成时是表示过去某个时间之前已经发生的动作或一直延续的动作或状态。→“过去的过去” 理解“过去的过去” ： 过去 过去的过去 现在 先发生的动作用过去完成时，后发生的动作用一般过去时。 例：The film had begun before we got to the cinema. 我到达电影院之前电影已经开始了。 had begun got By the time the policeman got to the shop, the thief had run away. Had the thief run away by the time the policeman got to the shop (1)肯定：主语＋had done (2)否定：主语＋had not done (3)疑问：Had＋主语＋ done 疑问词＋had＋主语＋ done Q2：过去完成时的结构？ Practice: By the time I walked into class, the teacher had started teaching already. By the time I walked into class, the teacher hadn’t started teaching yet. Had the teacher started teaching yet by the time you walked into class Q2：过去完成时的结构？ 否定句： 一般疑问句： I had finished reading the novel by nine o’clock last night. We had learned over two thousands English words by the end of last term. They had planted six hundred trees before last Wednesday. 过去的过去 Q3：过去完成时时间状语有哪些？ 1.by+过去的时间点 I had finished reading the novel by nine o’clock last night. 2.by the end of+过去的时间点 We had learned over two thousand English words by the end of last term. 3.before+过去的时间点 They had planted six hundred trees before last Wednesday. … … Q3：过去完成时时间状语有哪些？ My father asked me if I had finished reading that book. The lady showed me the pictures she had painted. I began the work after he had gone. 1.在 told，said，knew，heard，thought 等动词后的宾语从句, 主句为过去时，从句动作发生在主句之前，用过去完成时。 Q4：隐形的过去完成时 2. 状语从句 在过去不同时间发生的两个动作中， 发生在先，用 ... ...
