人教版(新教材)高中英语选修2Unit3 Food and Culture学案2：Grammar.docx

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1、Unit 3 Food and CultureGrammar一、过去完成时的概念过去完成时表示在过去某一时刻或某一动作之前发生的动作或状态，句中常用by, before, until, when等词引导时间状语。过去完成时除了强调动作发生在过去之外，还常用于 间接引语和虚拟语气的句子中。例如：* We had built five new buildings by the end of last year.到去年年底，我们已经建了五座新大楼。* The classroom hadnt been cleaned before the teacher came.老师来之前教室还没有清扫过。* Th

2、e researchers said at least 4% of the population in those countries had been infected.研究人员表示，那些国家至少有4%的人口被感染。* The letter was passed from one to another until everyone had read it. 这封信从一个人传 到另一个人，直到每个人都看完。* Helen said(that)she had moved to another flat.海伦说她已经搬到另一套公寓去了。* If only we had listened to th

3、eir advice!要是我们听了他们的建议就好了！注意：过去完成时的标志词和句型by+过去时 间点，before, until, hardly/scarcely.when.; no sooner.than; It was the first/second. time that(从句用过去完成时)二、过去完成时的构成1 .肯定句：主语+ had +过去分词+其他.2 .否认句：主语+had + not+过去分词+其他.3 .疑问句：Had +主语+过去分词+其他？疑问代词/疑问副词+had+主语+过去分词+其他？*The Union sent letters to the embassy to

4、 cheer on the Chinese people who had fought against the epidemic.工会致函大使馆，为抗击疫情的中国人民加油。*The country had not yet recovered from the effects of the war.这个国家还没有从战争的 影响中恢复过来。*How many new words had you learned before the foreign teacher came to your school?在外教来你们学校之前，你们学了多少新单词？三、过去完成时的被动语态的形式1 .肯定句：主语+ h

5、ad been done +其他成分.2 .否认句：主语+ had not been done +其他成分.3 .疑问句：Had +主语+ been done +其他成分？疑问词+ had +主语+ been done +其他成分？*By the time he got to the school, the first period had been finished.当他到达学校时,第 一节课已经结束了。*The boy was reminded that his homework had not been handed in.那个男孩被提醒他的 家庭作业还没有交。*How many bui

6、ldings had been destroyed when the hurricane ended?当飓风结束时，有 多少建筑物被摧毁了？注意：(1)过去完成时指发生在过去之前，也就是过去的过去的动作。用过去完成时必须有一个 表过去的时间作比照。例如：After he had finished his homework, he went to bed.他写完作业以后才去睡觉。(2)如果两个动作紧接着发生，那么常常不用过去完成时，特别是在包含before和after的复 合句中，因为从句的动作和主句的动作发生的先后顺序已经非常明确，可以用一般过去时代 替过去完成时。例如：After he ar

7、rived in England, Marx worked hard to improve his English.到 达英国后，马克思努力提高他的英语水平。跟踪练习I .用正确的时态和语态填空1. (2020新高考全国 I 卷)One morning she told her children about a family she (visit) the day before.2. It was supposed that he(have)a sudden attack of faintness.3. All the fine ladies and gentlemen of the coun

8、tryside(invite)before the party began.4. It was the first time she ever(speak) before such a big audience.5. Police asked passers-by if they(see) the accident happen.6. Nothing could have saved him even if he(tend) without delay.n.根据语境和所给词汇，用本单元所学的时态填空Our school was built in 1902. When I studied the

9、re, it 1.(be)famous throughout the country. By 1978, the schools use 2.(change) several times. By the end of last century, our school 3.(become) a provincial model high school. When I graduated, our school 4.(win) many honors both at home and abroad. Before last years anniversary of the founding of our school, all the school buildings 5.(rebuild) and it is now larger and more beautiful than before. 参*考*答*案 跟踪练习I . 1. had visited 2. had had 3. had been invited 4. had; spoken 5. had seen 6. had been tendedII. 1. had been 2. had changed 3. had become 4. had won 5. had been rebuilt