新概念英语_第二册_第21课_课件_3.ppt

Lesson 21Mad or not? New words and expressions生词和短语 课文讲解 动词语态 英语动词有两种语态 主动语态：主语是动作的执行者 被动语态：主语是动作的承受者 Many people speak English.(主动语态) English is spoken by many people.(被动语态) 模仿上列句子连词成句 Silk, produce, in Hangzhou. Cars, make, in Tianjin. tea, grow, in Fujian. English, speak, in Australia. Glass, produce, in Germany. Ships, make , in Japan. 被动语态构成 助动词+及物动词的过去分词 （ be + P.P.) 以see为例，比较主动语和态被动语态的结构形式 肯定句，否定句及疑问句如下。 Cars are made in Changchun. Cars are not made in Changchun. ---Are cars made in Changchun? (---Yes, they are./No,they aren’t.) Where are cars made? p26 被动语态使用方法 When can we use the passive voice? 不知道动作的执行者是谁，或没有必要指出动作的执行者时。 My bike was stolen last night. Letters are collected at eight every morning. 2. 为了强调或突出动作的承受者时。 The desk was made by Master Wang. The bag was taken away by his sister. 3. 为了更好地安排句子 The well-known person got on the bus and was immediately recognized by people. （一个主语就够了） 4. 在上下文中，为了使句子间连接紧密时。如： I have a new skirt. It was given to me as a birthday present by my aunt. 主动语态改为被动语态的方法 将主动语态的宾语改为被动语态的主语。 将主动语态的谓语动词改为“be+过去分词”结构。 将主动语态的主语改为介词 by之后的宾语，放在谓语动词之后（有时可省略）。 将下列句子改成被动语态。 1.We use English as a foreign language. → English is used as a foreign language( by us) 2. People write business letters in English → Business letters are written( by people) in English. 3.They make telephone calls in English. → Telephone calls are made( by them) in English. 4.Travelers and business people use English. → English is used by travelers and business. 5.Farmers grow rice in Zhejiang. → Rice is grown by farmers in Zhejiang 主动语态变为被动语态时注意 含直接宾语和间接宾语的主动语态变为被动语态时有两种情况: Eg He gave the boy an apple. → (1)把间接宾语改为主语,直接宾语保留不变: The boy was given an apple (2)把直接宾语改为主语,此时,间接宾语前要 加to或for. An apple was given to the boy. (give, pass, show, send--- to ) (buy, draw, make, ----for )  4. 带复合宾语的动词改为被动语态时,一般把主动语态的宾语改为主语,宾语补足语在被动语态中作主语补足语. He cut his hair short. →