人教版九年级英语上册《When was it invented?》SectionA PPT课件下载(第3课时)，共36页。ObjectivesTo understand and use the passive voice(past tense) be + v (ed).To talk about when inventions were invented and where they were invented.If you like, you can practice more.被动语态 (Passive Voice)结构: be + V-p.p.一般现在时的被动语态:am / are / is +动词的过去分词一般过去时的被动语态:was / were +动词的过去分词Many people speak English. (主动语态)English is spoken by many people.The naughty boy broke the window yesterday. (主动语态)The window was broken ( by the naughty boy) yesterday.主动句变为被动句所遵循的4个步骤：1. 把原主动句中的宾语变为被动句的主语。2. 把动词变为被动形式即be+过去分词，并注意其人称和数随主语的变化，而动词的时态则保持不变。3. 原主动句的主语如需要则放在by后面以它的宾格形式出现（注代词的宾格），如不需要则可省略。4. 其它的成分（定语、状语）不变。Grammar FocusWhen was the zipper invented?It was invented in 1893.Who was it invented by?It was invented by Whitcomb Judson.When was tea brought to Korea?It was brought to Korea during the 6th and 7th centuries.What is the hot ice-cream scoop used for?It’s used for serving really cold ice-cream.一般过去时的被动语态一般过去时的被动语态的句式结构主语+was/were+及物动词的过去分词（ + by…）主语+was/were + not+及物动词的过去分词（+ by…)Was/Were+主语+及物动词的过去分词（+by …)?特殊疑问词+was/were+主语+及物动词的过去分词（ +by...)?2. 一般过去时的被动语态的基本用法表示过去某一具体时间发生的动作，且句子的主语是谓语动词动作的承受者。讲述发生在过去的动作，且不知道动作的执行者。He was honored with the name“ Father of Hybrid Rice”.他被授予“杂交水稻之父”的称号。3.含双宾语和复合宾语的主动句变为被动语态的方法①含有双宾语的主动句变为被动语态时，通常把指 “人”的间接宾语变为主语，而指“物”的直接宾语则不变。►He gave me a book yesterday.I was given a book (by him) yesterday.②如果要把指“物”的直接宾语变为主语，则在间接宾语前加to或for。►I brought him some food.Some food was brought to him (by me).③含有复合宾语的主动句变为被动语态时，要将其中的宾语变成主语，宾语补足语不变。►Jim asked Tom to go for a walk.Tom was asked (by Jim) to go for a walk.④ 如果宾语补足语是不带to的动词不定式，主动语态变成被动语态时要加上不定式符号 to。►We often heard Kate sing in the room.Kate was often heard to sing in the room (by us).Language points1. all of a sudden: 突然；猛地可写作of a sudden, on a/the sudden 或all on a sudden。例句：►突然，灯都灭了。 All of a sudden, the lights went out.►那个男孩突然开始哭起来。The boy began crying all of a sudden.2. luckily作副词，意为“幸运地”，也可换成to my luck或 luckily for me，其后通常用逗号与句子其他成分隔开。例句：►Luckily, she was at home when I called.幸好当我打电话时她在家。HomeworkWrite a dialog about their things using the passive voice.Finish off the exercises on the text book.Read 4b and 4c.... ... ...关键词：When was it invented? PPT课件免费下载，.PPTX格式； 本作品中主体文字及图片可替换修改，文字修改可直接点击文本框进行编辑，图片更改可选中图片后单击鼠标右键选择更换图片，也可根据自身需求增加和删除作品中的内容，源文件无水印。如认为该内容涉嫌侵权，可通过邮件提出书面通知，我们将及时处理。