新概念英语第二册Lesson21Madornot.ppt

Mad or not?;Pre-task;;;sum 名词 n. [C] 1.总数,总和,总计[the S][(+of)] She paid the sum of $200 for dresses. 她买衣服总共花了二百元钱。 2.【数】和[the S][(+of)] 3.金额;一笔[(+of)] He earned a large sum of money. 他赚了一大笔钱。 4.概要;要点[the S][(+of)] 5.算术题;运算 The boy is good at doing a sum in his head. 这男孩善于心算。 ;;;;;;;Aeroplanes are slowly driving me mad.;I live near an airport and passing planes can be heard night and day.;The airport was built years ago,but for some reason it could not be used then.;Last year,however,it came into use。;Over a hundred people must have been driven away from their homes by the noise.;Sometimes I think this house will be knocked down by a passing plane。;;词组;习惯用语;;I have been offered a large sum of money to go away,but I am determined to stay here.; ;Read the following sentences 1.It is called a stamp. 2.What’s it made of? 3.Which language is spoken by the largest number of people in the world. 4.English is used very widely as a foreign language, 5.Silk is produced in Suzhou. 6.Where are bananas grown? ;二。模仿上列句子连词成句;被动语态构成;;肯定句，否定句及疑问句如下。;Read text-2;Article1_popwin_title; 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. →;4.Travelers and business people use English. →;过去 时,含情态动词的被动语态;He can answer the question. → We must plant trees in spring. → Nurse should take care of the children. →;主动语态变为被动语态时注意;含双宾语的被动My father gave me a new book on my birthday . A new book was given to me (by my father  I was given a new book (by my father)…. ;2.不带的to不定式,改为被动语态时不定 .式前要加to . They watched the children sing. → The children were watched to sing . 3.短语动词是不可分割的整体,改为被动语态时要保持其完整性,介词或副词不可遗漏. We must take good care of the young trees. → Young trees must be taken good care of.;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. → His hair was cut short. They told him to help me. → He was told to help me. 5. 注意: 不及物动词不能用被动语态happen