Unit 3 Discovering Useful Structures 语法课件 -2022-2023学年高中英语人教版（2019）选择性必修第二册

Discovering Useful Structures Grammar—— 过去完成时与过去完成时的被动语态 Unit 3 Food and Culture Lead-in The chef had set up a farm-to-table restaurant before his new cookbook was published. A new farm-to-table restaurant had been set up by the chef before his new cookbook was published. Past Perfect Tense: had done Observe & Discover Which action happened first, “set up” or “was published”? Active Voice Passive Voice Leading-in Look at the two pairs of sentences. The chef had set up a farm-to-table restaurant before his new cookbook was published. A new farm-to-table restaurant had been set up by the chef before his new cookbook was published. Underline the predicate verbs. Circle the conjunctions. 后 先 时态：过去完成时 语态：主动 结构：had done 先 时态：一般过去时 语态：被动 结构：was/were done 后 时态：过去完成时 语态：被动 结构：had been done 时态：一般过去时 语态：被动 结构：was/were done They had finished their dinner by the time Sam joined them. Their dinner had been finished by the time Sam joined them. 时态：一般过去时 语态：主动 结构：did 动作：后发生 时态：过去完成时 语态：被动 结构：had been done 动作：先发生 时态：一般过去时 语态：主动 结构：did 动作：后发生 Try to analyse the sentences below. 时态：过去完成时 语态：主动 结构：had done 动作：先发生 一、什么是过去完成时？ 表示过去某一时间或动作之前发生的动作或状态，以及对过去的某一点造成的某种影响或是结果。 例： 1. By nine o'clock last night, we had got 200 pictures from the spaceship. 2. All the tickets had been sold out when they arrived. 表示在过去某一时间或事件之前已经完成的动作或已经存在的状态。 过去完成时 The Past Perfect Tense The chef had set up a farm-to-table restaurant before his new cookbook was published. The media reported that these companies had treated pollution as a hot potato. 动作已经完成 事件已经存在 二、过去完成时的构成 基本结构：had＋动词过去分词 (1)肯定句：主语＋had＋动词过去分词＋其他。 (2)否定句：主语＋had＋not＋动词过去分词＋其他。 He had already been to New York earlier in the week. 本周早些时候他去过纽约。 At that time we hadn't met her. 那时我们还没有见到她。 (3)疑问句：Had＋主语＋动词过去分词＋其他？ 肯定回答：Yes，主语＋had. 否定回答：No，主语＋hadn't. — Had you visited here before? — Yes, I had. / No, I hadn't. (4)特殊疑问句：特殊疑问词或词组＋had＋主语＋ 过去分词＋其他？ Where had you been before you came here? (5)被动语态：主语＋had (not)＋been＋动词过去分词 ＋