1、比较等级语 境 自 主 领 悟先观察原句后自主感悟1.The book is as interesting as that one.2.The physics lesson was a lot more interesting than the chemistry lesson.3.The earth is twice as large as the moon.4.The earth is fortynine times larger than the moon.5.The stone bridge is twice the length of the wood one.6.Its getti
2、ng brighter and brighter！7.The closer you are, the more youll see.1.例句1为同级比较，其结构为：as形容词原形as。2.例句2为比较等级，其结构为：比较级than.。3.例句3、4、5为倍数表达法，其结构分别是：(1)倍数as形容词原形as; (2)倍数形容词比较级than; (3)倍数the名词of.4.例句6、7是比较级的特殊句式：其中例句6的结构是“比较级and比较级”；例句7的结构是“the比较级， the 比较级”。一、比较级的基本用法1同级比较：.as形容词/副词as.“和一样” ；否定式为：.not as/so形
3、容词/副词as.“和不一样； 不如” Tom runs as fast as Mike.汤姆和迈克跑得一样快。Wealth is not so important as health.财富不如健康重要。名师点津在此句式中，若形容词原级后面跟单数可数名词，则应注意冠词与形容词的位置关系，即as形容词a/an单数名词as “和一样”。He is as clever a boy as his brother.他是和哥哥一样聪明的男孩子。2比较级：形容词/副词比较级than.表示 “比更” 。My computer is more expensive than hers.我的电脑比她的贵。Robert
4、 jumps higher than any of the others.罗伯特比其他任何人跳得都高。名师点津(1)使用比较级时比较的对象应该相同。为了简洁起见， 可用that代替前面出现的不可数名词或可数名词单数， those代替可数名词复数。正：The weather of Shanghai is warmer than that of Beijing.误：The weather of Shanghai is warmer than Beijing.上海的天气比北京的天气暖和。(2)比较双方如果一方在程度或数量上超过另一方时， 可在比较级前加上副词修饰语。常见的有：much, a litt
5、le, a bit, a lot, far, by far, even, still, rather, any(疑问句、 否定句或条件状语从句), a great deal等。She drives still much more carefully than her husband.她开车比她丈夫认真多了。This movie is far more interesting than I expected.这部电影比我原想的有意思得多。Are you feeling any better today? 你今天感觉好些了吗？即时演练1单句改错(每小题仅有一处错误)Do you mind if w
6、e stay a bit of longer today？删去ofIt is even cold today.coldcolderBut it doesnt mean they can do it some better than the rest of us.someanyA bike runs much more slowlier than a motorbike.slowlierslowly二、比较级的特殊结构1the比较级(主语谓语), the比较级(主语谓语) 表示 “越， 越” The more you study, the more you know.学得越多， 懂得越多。2比较
7、级and比较级， 表示 “越来越” It becomes warmer and warmer when spring comes.春天来了，天气越来越暖和了。My hometown is getting more and more beautiful.我的家乡变得越来越美丽。3the形容词/副词比较级of.表示 “两者之中比较的一个” This is the bigger of the two rooms.这是两个房间中较大的一个。The younger of the two brothers is a teacher.两兄弟中较年轻的那个是一名老师。4“否定词比较级” 表示最高级含义I ca
8、nt agree with you more.我再同意你不过了。I have never seen a more interesting book.这是我所看过的最有趣的一本书。5no比较级than“和一样不”not 比较级than“不如”This book is no more interesting than that one.这本书和那本书一样没趣。This book is not more interesting than that one.这本书不如那本书有趣。即时演练2单句语法填空He has never spent a more worrying day.More(many) a
9、nd more foreigners have been to the Great Wall.The harder(hard) he worked, the more he got.三、倍数表达法1倍数as形容词或副词的原级as.Asia is about four times as large as Europe.亚洲大约是欧洲的四倍大。2倍数形容词或副词的比较级than.This road is twice longer than that one.这条路比那条路长两倍。3倍数the性质名词(size, height, depth, length, width)of.This stone
10、tower is twice the height of the wood one.这座石塔是那座木塔的两倍高。4倍数as many/much 名词as.We have produced three times as many computers as we did last year.我们生产的计算机是去年的三倍多。即时演练3单句语法填空Paper produced every year is three times heavier(heavy) than the worlds production of vehicles.My uncles house in the downtown ar
11、ea is much smaller than ours, but its twice as expensive.This room is twice the length (long) of that one, but it is much narrower.单句语法填空1According to a review of evidence in a medical journal, runners live three years longer (long) than nonrunners.2Corn uses less water than rice and creates less fe
12、rtilizer(化肥) runoff.3He screams the loudest(loud) of all.4There could be an even higher (high) cost on your health.5Even worse (bad), the amount of fast food that people eat goes up.6Sixteen years earlier (early), Pahlsson had removed the diamond ring to cook a meal.7If you feel stressed by responsi
13、bilities at work, you should take a step back and identify(识别) those of greater (great) and less importance.8I have always enjoyed all the events you organized and I hope to attend many more (many) in the coming years.9Finally，that hard work paid off and now the water in the river is cleaner(clean)
14、than ever.10The harder (hard) you try to beat him, the more likely you will get hit.单句改错(每小题仅有1处错误)1Ive worked with him for some time and have found he is more excellent teacher than Mike.more前加a2Im not satisfied with her answer at all.It couldnt have been bad.badworse3I like Rose and Mary, but I th
15、ink Rose is nicer of the two.nicer前加the4The TV set sold in this store is more cheaper than the one sold in that store.moremuch或去掉more5The more you practice, and the better result you will get in the exam.去掉and6I think its too expensive.Id like a cheap one.cheapcheaper7The more difficult the problem
16、is, the much careful you should be.muchmore8The restaurant wasnt half as better as that restaurant we went to.bettergood9Professor Wang has written some short stories, but he is well known for his plays.wellbetter10The weather isnt good enough for an outing, is it?Not at all.We cant have a worst day at this time of the year.worstworse
