Lesson 21 Mad or not？（课件）新概念英语第二册

Mad or not? Pre-task How does the writer feel about aeroplanes? What has made most of his neighbours leave their homes? Why does people think the writer is mad? ☆mad adj. 发疯 be mad/crazy about:为……而疯狂 be mad at sb eg:Don't be mad at him。 别怪他（不关他的事）。 go+adj:变得 go mad/crazy/insane/bananas Don't fight with him, he is a mad man. 别跟他打架, 他是疯子。 ☆sum n.量 大量：a great many/a great number of+可数名词复数 a sum of:一笔 a large sum of:大量的，喜欢跟钱连用 a large sum of money a large amount of:许多 plenty of（注意：前面没有a）足够的 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。 及物动词 vt. 1.计算...的总和[(+up)] 2.总结;概括;概述[(+up)] The story may be summed up in one sentence. 该故事可以用一句话来概括。 不及物动词 vi. 1.共计[(+to/into)] ☆determined adj. determined adj. 坚定的，下决心的 I am determined to stay here.我决定留在这儿。 　 be determined to do sth. 决心做某事 　　 v.determine on 决定 　　 v.determine upon 决定 　determine sb. against sth. 使 某人决定不做某事 determine sb. to do sth. 使某人决定做某事 decide和determine 之间的区别： 　　都有“决定”的意思。 　　 decide 指“经过询问、研讨和考虑之后, 在几种可能的选择之中作出决定”,decide 最为普通： 如: 　　 She decided to leave here on Sunday instead of Monday. 　　 她决定星期日而不是星期一离开这里。 determine指“决心作某一件事而不动摇”, 常涉及范围比较狭小的问题： 如: 　　 We have determined to get the work done ahead of schedule. 　　 我们已经决定要提前完成这项工作。 decided常与to, that, on, about用，表示决心；决定 ； 　　 to decide where to go 　　 决心去哪儿 　　而与between, for, angainst, in favor of, that连用，表示判断，判决 　　 The judge will decide the case tomorrow. 　　 法官将于明天对案子进行判决。 reason [’ri:zən] n.原因 for this reason:由于这个原因 For what reason? 是为了什麽原因？ bring sb. to reason 使某人讲理 Aeroplanes are slowly driving me mad. ☆drive sb mad:逼某人发疯 例：Sometimes it's enough to drive you mad if you are stuck in a traffic jam during the rush hour. 有时在交通高峰期被困足以使人发疯 The noise outside is driving me mad. I live near an airport and passin