八年级英语语法比较级知识讲解.doc

新目标人教版八年级英语语法知识讲解重难点知识讲解：形容词的比较级和最高级一、 比较级的定义：大多数的形容词都有三个级别：原级、比较级、最高级。其中比较级表示“更”，用于两者之间的比较，用来说明“前者比后者更”，比较级前面一般用much, even, a little修饰，其中even, much 只能修饰比较级。二、比较级的构成：（1）规则变化：单音节和部分双音节的形容词一般在词尾加-er Eg: calm-calmer tall-taller smart-smarter以字母e结尾的直接在词尾加-r Eg: nice-nicer fine-finer large-larger以“辅音+y 结尾的词，变y为 i，再加-er” Eg: early-earlier happy-happier busy-busier以重读闭音节的单个辅音字母结尾的词，双写辅音字母，再加-er Eg: big-bigger thin-thinner hot-hotter多音节或部分双音节的形容词在原级前面加more Eg: popular-more popular important-more important（2）不规则变化：少数形容词的比较级变化是不规则的：good-better bad/ill-worse many/much-morelittle-less far-farther/further old-older/elder三、比较级的用法:(一)当两个人或事物（A和B）进行比较时，我们需要用到形容词（副词）的原级或者比较级1表达“A和B一样”，用asas的结构。公式: A+be动词+as+形容词原级+as+B A+实义动词+as+副词原级+as+BEg I am as tall as you.我和你一样高。 He runs as fast as I. 他跑得和我一样快。2表达“A不如B”用not asas的结构。公式: A+be动词的否定形式+as+形容词原级+as+B A+助词的否定形式+动词+as+形容词原级+as+BEg I am not as tall as you.我没有你高。 He doesnt run as fast as I. 他没有我跑得快。2表达“A大于B”用“比较级+than”的结构。公式: A+be动词+形容词比较级+than+B A+实义动词+副词比较级+than+BEg I am taller than you.我比你高。 He runs faster than I. 他跑得比我快。(二)关于形容词、副词比较级的更多用法1比较级前面可以加上表示“优劣程度”的词或短语，意思是“更”，“得”。常见词有much, a little, even, a lot, a great deal等。Eg He is much taller than I.他比我要高得多。I jump a little higher than he.我跳得比他高一点点。想一想，这些词能修饰形容词或副词的原级吗？2.比较级前面可以加上表示具体数量差别的结构,表示具体“大多少”，“小多少”，“长多少”，“短多少”等。Eg I am two years older than he.我比他大两岁。This building is 20 meters higher than that one.3“比较级+and+比较级”表示“越来越”。 It is getting warmer and warmer天气越来越暖和。He is running faster and faster他跑得越来越快。0ur country is becoming more and more beautiful我们祖国越来越美了。4“the more， the more”表示“越，就越”，The more，the better.多多益善。The more careful you are,the fewer mistakes you will make.你越细心，犯错就越少。5“the 比较级of the two”表示“两个当中较。的一个” The taller of the two boys is my brother.6.Which/Who+is+比较级，AorB?Which city is bigger,Beijing or Tianjin?四、当三个或三个以上的人或事物进行比较时，我们需要用到形容词（副词）的最高级1表达“是中最的”,用“the+形容词（副词）的最高级”的结构。后面可以加上表示范围的介词短语或从句。公式：主语+be动词+the +形容词最高级+（名词）+表示范围的介词短语或从句主语+实义动词+（the） +形容词最高级+表示范围的介词短语或从句Eg He is the tallest (student) in our class. He jumps the highest of the three boys. This is the best book that I have ever read.2表示“最的中一个”，用“one of +the +最高级+复数名词”的结构来表达。Eg He is one of the best students in our class.他是我们班最好的学生之一。This is one of the most beautiful flowers in the garden.这是花园里最漂亮的花之。注意：(一) 形容词的最高级前面有定冠词the , 而副词的最高级前面定冠词the可以省略。但在形容词最高级前有物主代词时，不能要定冠词the.（二）常见的用来表示范围的介词有in, of, among五、运用形容词、副词比较级应当注意的问题： (一)、按语法规则，than后面的人称代词应当用主格，但口语当中有时会用宾格代替主格。 Eg He is more careful than I (me).(二)、只有同类的事物才能比较 e.g Her bag is bigger than mine. 不能说 Her bag is bigger than I.The weather of Kunming is much better than that of Shenyang.不能说The weather of Kunming is much better than Shenyang.【语法专项练习题】1、That boy looks as as a boxer.A. strong B. stronger C. strongest D. more strong2、Then Summer Palace is than Zhong Shan park.A. biger B. more big C. the biggest D. bigger3、Which do you like , apples or oranges?A. good B. better C. best D. well4、-Oh, the food is bad. -I think so .And the service(服务) is _. Athe worst B. worse C. badder D. the worse5、-You are the same coat as I. -Yes, Mine is , but not so as yours.A. better, expensive B. better, more expensive C. much better, more expensive D. good, more expensive6、The experts think that Indias population may be than Chinas 2020.A. much, by B. more, in C. larger, by D. larger, on7、This year our school is than it was last year.A. much beautiful B. the most beautiful C. beautifuler D. much more beautiful8、 you work, knowledge you will get.A. The harder, moreB. The harder, the moreC. Harder, the moreD. Harder, more9、He has friends than I.A. much more B. many more C. very more D. too more10、She draws better than .A. us all B. we all C. all us D. all we11、Shanghai is larger than city in China. A. any B. any other C. the others D. any else12、Im not sure whether Mary can sing Ann.A. as well as B. as good as C. as better as D. so good as13、I have fewer apples than .A. he B. his C. hers D. mine14、The news is surprising.A. much B. very C. more D. very much15、The population of China is larger than .A. America B. the one of Americas C. that of America D. Americans16、Which is _clothing store in your town? A. the best B. the better C. the most good D. best17、My sister is _person I know. A. the funniest B. the funnier C . the most fun D. funniest18、Is Mr Du _ teacher in your school?A. the most busy B. the busier C. the most busiest D. the busiest19、He is _more beuutiful than I.A. too B. enough C. much D. very20、The box is _heavy .I cant move it.A. much B. more C. enough D. too21、The book is the_one in the bookshop Athe most cheap Bthe expensive Cthe most expensive Dthe less expensiver22、I have _ apples and _milk than you.A. many, little B. more, less C. more, least D. many, less 23、You should study English hard, because its getting_ in our country .A. more and more important B. more important and more importantC. importanter and importanter D. important and important24、Her brother is _than she. A. 7 year older B. 7 year old C. 7 years old D. 7 years older25、The Famous People Talent Show was one of _that I have ever seen.A. the most fantastic show B. most fantastic shows C. the more fantastic shows D. the most fantastic shows