新概念英语第四册笔记Lesson2.docx

新概念英语第四册笔记Lesson2Why, you may wonder, should spiders be our friends ? Because they destroy so many insects, and insects include some of the greatest enemies of the human race. Insects would make it impossible for us to live in the world; they would devour all our crops and kill our flocks and herds, if it were not for the protection we get from insect-eating animals. We owe a lot to the birds and beasts who eat insects but all of them put together kill only a fraction of the number destroyed by spiders.Moreover, unlike some of the other insect eaters, spiders never do the least harm to us or our belongings.Spiders are not insects, as many people think, nor even nearly related to them. One can tell the difference almost at a glance for a spider always has eight legs and an insect never more than six. How many spiders are engaged in this work on our behalf ? One authority on spiders made a census of the spiders in a grass field in the south of England, and he estimated that there were more than 2,250,000 in one acre, that is something like 6,000,000 spiders of different kinds on a football pitch. Spiders are busy for at least half the year in killing insects. It is impossible to make more than the wildest guess at how many they kill, but they are hungry creatures, not content with only three meals a day. It has been estimated that the weight of all the insects destroyed by spiders in Britain in one year would be greater than the total weight of all the human beings in the country.T. H. GILLESPIE Spare that Spider from The ListenerNew words and expressions 生词短语flocks and herds 牛群和羊群／flCk/ the birds of the same feather flock together.物以类聚，人以群分you are the same flock.也可指人herd多指牛群cowherdcowboythrong and crowd swarmowe /[U/ vt.感谢欠 i owe you.i owe you a big favor. 欠issueobligeindebt appreciate----常用口语词 正式：gratefulthankfulbeast /bi: st/ n 兽形容人野蛮无比，不能用animal 形容creature可以指小孩，女人，不用于男性．fraction / ＇frAkF[n/ n.小局部 分数，小数 a fraction of rice will sufficeon one＇s behalf 代表．．．利益I beat you on your behalf.我打你是为你好 on behalf of somebody /somethinge.g on behalf of chinese government on behalf of ＝representauthority /C:＇WCriti/ n.权威authorize批准 authoritative权威性的 authoritarian*的－tarian带有这种词缀的词都是坏词 dictator*者dictatorial*的authorities １．权威（可单数可复数） ２．*（复数）census /sens[s/ n.统计数据the fifth national population census.censor审查censorious 挑剔的，挑刺的acre /＇eik[/ n.英亩 １acre＝４０４７square metersfootball pitch 足球场 football yardfootball court football fieldbe content with 满意于 满意作表语，不能消失定语构造He is content with status quo.contented heart :心满足足的人spare /spZ[/ v. 不损害，宽恕spare meHe doesn’t spare himself.I spare no efforts to learn english.( spare no efforts: 不遗余力作什么)Notes on the text 课文解释why, you may wonder－you may wonder why插入语 先不管插入语，弄清句子构造you may wonder why spiders should be our friends？插入语位置不固定why以疑问句 开头why,you may wonder,the problem of pollution befalls human beings.why,you may wonder,one of my friends is so kindhearted.destroy程度比damage要重得多，片甲不留，毁灭光tear into piecesdear enemygreatest enemies:天敌dying enemycrying enemyhuman race:人的种族，一般不加复数，表示一个总称词impossible 和possible 永久不要以人开头It is impossible for somebody to do something.likely可以以人做主语。

i am likely to go. probable 也不以人做主语they would表示假设devour狼吞虎咽devour the foodmake a cake of myself make a god of myselfdevour the bookit虚拟语气 前面是主句，下面是条件句前面一般的加动词devour,后面用一般过去时If it were not for:假如这不是由于I would not survive if it were not for his timely help.but for 肯定是虚拟语气 ＝if it were not forowe感谢，欠 i owe you.引出主题all of them put together:把他们堆到一起destroyed 后置定语，重心转到 spider 谓语动词是kill 【】 新东方新概念英语课程以其独特魅力及公认的效果享誉海内外,它以其严密的体系性、严谨的科学性、精湛的有用性、浓郁的趣味性受到了世界各地英语学习者的青睐欢送大家免费试听！点击进入>>） 。