1、一、形容词、副词的比较级和最高级的构成规则1一般单音节词和少数以-er,-ow结尾的双音节词,比较级在后面加-er,最高级在后面加-est;(1)单音节词,如:smallsmallersmallestshortshortershortest(2)双音节词,如:clevercleverercleverestnarrownarrowernarrowest2以不发音e结尾的单音节词,比较在原级后加-r,最高级在原级后加-st;如:largelargerlargest3在重读闭音节(即:辅音元音辅音)中,先双写末尾的辅音字母,比较级加-er,最高级加-est;如:bigbiggerbiggesthot
2、hotterhottestfatfatterfattest4以“辅音字母y”结尾的双音节词,把y改为i,比较级加-er,最高级加-est;如:easyeasiereasiestheavyheavierheaviest5其他双音节词和多音节词,比较级在前面加more,最高级在前面加most;如:beautifulmore beautifulmost beautifuldifferentmore differentmost differenteasilymore easilymost easily注意:(1)形容词最高级前通常必须用定冠词the,副词最高级前可不用.The Sahara is th
3、e biggest desert in the world.(2)形容词most前面没有the,不表示最高级的含义,只表示非常. It is a most important problem.=It is a very important problem.6有少数形容词、副词的比较级和最高级是不规则的,必须熟记。如:good/wellbetterbestbad/illworseworstoldolder/elderoldest/eldestmany/muchmoremostlittlelessleastfarfurther/fartherfurthest/farthes二、形容词、副词的比较级
4、和最高级的用法1“A + be +形容词比较级+ than + B”,意思为“A比B更”。如:This tree is taller than that one.这棵树比那棵树高。注意:在含有连词than的比较级中,前后的比较对象必须是同一范畴,即同类事物之间的比较。在比较级前面使用much,even, a little, a lot, a bit, far 等词修饰。A watermelon is much bigger than an apple.very, quite, so, too, enough只能修饰原级,不能修饰比较级。2“比较级+ and +比较级”或“more and mo
5、re +原级”,表示“越来越”It becomes warmer and warmer when spring comes.春天来了,天气变得越来越暖和了。It is getting cooler and cooler.天气越来越凉爽。The wind became more and more heavily.风变得越来越大。Our school is becoming more and more beautiful.我们的学校变得越来越美丽3在含有or的选择疑问句中,如果有两者供选择,前面的形容词要用比较级形式。Who is taller, Tim or Tom?谁更高,Tim还是Tom?4
6、 “the +比较级, the+比较级”,表示“越越”。The moremoney you make,the moreyou spend.钱你赚得越多,花得越多。The sooner,the better.越快越好。5.表示倍数的比较级用法:. A + be +倍数+ times +the +形容词对应名词形式+ of + B.The new building isthree times the height ofthe old one.这座新楼比那座旧楼高三倍。(新楼是旧楼的四倍高). A + be +倍数+ times+as +原级+ as+ B.Asia isfour times as
7、 large asEurope.亚洲是欧洲的四倍大。(亚洲比欧洲大三倍). A + be +序数词+比较级+ than + B.Our school istwice bigger thanyours.我们学校比你们学校大两倍。6.形容词、副词的最高级形式主要用来表示三者或三者以上人或事物的比较,表示“最”的意思。句子中有表示范围的词或短语。如:of the three, in our class等等。He is the tallest in our class.他在我们班里是最高的。7.as.as.表示同级比较,意为“像一样”两个as之间用形容词副词的原级。其否定形式为not as/so.as
8、意为“不像那样”。Wang Wei runs as fast as Liu Bin.王伟和刘斌跑的一样快。My hometown is not as/so famous as Beijing.我的家乡没有北京有名。8.形容词最高级前面可以加序数词,表示:“第几最”。如:The Yellow River is the second longest river in China.黄河是中国第二长河。9.形容词最高级前面可以有形容词性物主代词、指示代词、名词所有格等修饰,此时不能再用冠词。如:This is our best lesson today.这是我们今天最好的一节课中招真题演练:1.(
9、2015河南)-What a clear blue sky it is! -Yes. I have never seen _ sky.A.a more bueutifulB.a most beautifulC.the more beautifulD.the most beautiful2.(2015重庆)He has _ arms now and is able to pick the table up with one hand.A.weakestB.weakerC.strangestD.stranger3.(2015江西)-The scarves are all beautiful. I
10、cant decide which one to choose. -Oh, look at this red one. I think its _ .A.beautifulB.more beautifulC.the most beautifulD.less beautiful4.(2015广东广州)Emma looked after her pet dog _ of all her friends.A.carefulB.most carefulC.more carefullyD.the most carefully5.(2015上海)Alex did the project on community service _ better than his classmates.A.soB.veryC.too D.much你做对了吗?keys:A D C D D