Unit 7 What's the highest mountain in the world? 比较级最高级语法精讲

语法精讲
形容词和副词的比较级用于两者之间的比较, 表示“较…...”或“更……一些”；形容词和副词的最高级用于三者或三者以上的人或物之间的比较，表示“最……”形容词最高级前一般要加定冠词the，副词最高级前的the可以省略。
比较级和最高级的构成:
1. 规则变化
2. 不规则变化
形容词比较等级的基本句型
等级 句型 例句
原级 as+原级+as，意为“和……一样” I think this book is as interesting as that one. 我认为这本书和那本书一样有趣。
not+as/so+原级+as，意为“不如……” It’s not as/so hot today as yesterday. 今天不如昨天热。
less+原级+than，意为“不如……” least+原级, 意为“最不.......” This story is less interesting than that one. 这个故事不如那个故事有趣。 This story is the least interesting of the three.
比较级 比较级+than，意为“一者比另一者……” Your T-shirt is nicer than his. 你的T恤衫比他的好看。
“比较级 + and + 比较级”。表示“越来越…… ”。 多音节词的只需用“more and more +形容词或副词”构成此用法。 Our country is getting stronger and stronger. The girl has done her homework more and more carefully since last term.
The +比较级, the +比较级 表示“越,...,就越....” The busier we are, the happier we will be.
the+比较级+of the two...，意为“……两者中较为……的一个” Jack is the younger of the two boys. 杰克是两个男孩中年龄较小的一个。
数词+times+比较级+than，意为“比……更……” This room is three times bigger than that one. 这个房间比那个房间大三倍。
比较级+than+any other+单数可数名词/比较级+than+the other+复数可数名词，意为“比其他任何一个都……” He is taller than any other boy in his class. =He is taller than the other boys in his class. 他比班里的其他任何一个男孩都高。
最高级 the+形容词最高级+名词+in/of/among短语 Jim is the tallest boy of all. 吉姆是所有男孩中个子最高的。
疑问词+be+the+最高级 Which is the biggest, the sun, the moon or the earth 太阳、月亮和地球哪一个最大？
the+序数词+最高级，意为“第几最……” The Yellow River is the second longest river in China. 黄河是中国第二长河。
one of the+最高级+复数名词，意为“最……之一” Shanghai is one of the biggest cities in the world. 上海是世界上最大的城市之一。
【基础巩固】
用所给词的适当形式填空。
1. Your classroom is _____ (wide) and _____ (bright) than ours.
2. There are _____ (few) hours of sunlight a day in winter than in summer.
3. Which do you like _____ (well) , maths or chemistry
4. This is the _____ (good) film I have ever seen.
5. Africa is the second _____ (large) continent.
6. What he said made his mother much _____ (angry) .
7. I’m not as _____ (careful) as he.
8. We’ve got as _____ (many) books as we need.
9. Practice as _____ (much) as you can.
10. They have done _____ (much) work with _____ (little) money.