比較級的用法教案教學

1、一、形容詞、副詞的比較級和最高級 的構(gòu)成規(guī)則1 . 一般單音節(jié)詞，比較級在后面 加-er,最高級在后面加-est;(1)單音節(jié)詞如：small-smalleLsmallest shortshortershortesttall-taller-tallestThe wind became more and more heavily.風變得越來越大.Our school is becoming more and more beautiful.我們的學校變得越來越美麗.在含有or的選擇疑問句中，如 果有兩者供選擇,前面的形容詞要用比 較級形式.如：Who is taller,Tim or Tom? 誰

2、更高,Tim還是Tom?. the + 比較級.,the+比較 級，表示越越”.The more money you make, the more you spend.錢你賺得越多，花得越多.The sooner,the better.越快越好.表示倍數(shù)的比較級用法：.A is .times the size/height/length/width of B.如:The new building is three times the height of the old one.這座新樓比那座舊樓高三倍.（新 樓是舊樓的四倍高）.A is .times as big/high/long/wide

3、/large as B.如:Asia is four times as large as Europe.亞洲是歐洲的四倍大.（亞洲比歐 洲大三倍）.A is .times larger /higher/longer/wider than B.如:Our school is twice bigger than yours.我們學校比你們學校大兩倍.形容詞、副詞的最高級形式主 要用來表示三者或三者以上人或事物 的比較，表示最的意思.句子中有表示范圍的詞或短語. 如:of the three, in our class 等等.如:He is the tallest in our class.他在我們

4、班里是最高的.否定詞語+比較級，否定詞語 + so. as結(jié)構(gòu)表示最高級含義.Nothing is so easy as this.二Nothing is easier than this.=This is the easiest thing.比較級與最高級的轉(zhuǎn)換：Mike is the most intelligent inhis class.Mike is more intelligent than any other student in his class7.修飾比較級和最高級的詞1）可修飾比較級的詞.a bit, a little, rather, much, far, by far

5、, many, a lot, lots, a great deal, any, still, even 等.還可以用表示倍數(shù)的詞或度 量名詞作修飾語.以上詞（除by far）外，必須置于 比較級形容詞或副詞的前面.注意：使用最高級要注意將主語 包括在比較范圍內(nèi).（錯）Tom is the tallest of his three brothers.（對）Tom is the tallest of the three brothers.2）下列詞可修飾最高級：by far, far, much, mostly, almost.This hat is nearly / almost the big

6、gest.注意：a. very可修飾最高級，但位置與 much不同.This is the very best.This is much the best.b.序數(shù)詞通常只修飾最高級.Africa is the second largest continent.要避免重復(fù)使用比較級.（錯）He is more cleverer than his brother.（對）He is more clever than his brother.（又寸）He is cleverer than his brother.要避免將主語含在比較對象中.（錯）China is larger that anycou

7、ntry in Asia.（對）China is larger than anyother country in Asia.要注意對應(yīng)句型，遵循前后一致的原則.The population of Shanghai is larger than that of Beijing.It is easier to make a plan than to carry it out.要注意冠詞的使用，后有名詞 g reatg reaterg reatest-o (2)雙音節(jié)詞如:clevercleverercleverestn a r ro wn a rrowe r n a rrowest.以不發(fā)音e結(jié)尾

8、的單音節(jié)詞， 比較在原級后加-r,最高級在原級后加- st;如:large-largerlargestnicenicernicest的時候，前面才有可能有名詞.比較：Which is larger, Canada or Australia?Which is the larger country, Canada or Australia?She is taller than her two sisters.She is the taller of the twosisters.ableablerablest.在重讀閉音節(jié)（即：輔音+ 元音+輔音）中,先雙寫末尾的輔音字 母，比較級加-er,最高級

9、加-est;如:bigbiggerbiggest hothotterhottest fatfatterfattest.以輔音字母+ y結(jié)尾的雙 音節(jié)詞，把y改為i,比較級加-er,最高 級加-est;如:easyeasiereasiestheavyheavierheaviestbusybusierbusiest happyhappier-happiest.其他雙音節(jié)詞和多音節(jié)詞，比 較級在前面加more,最高級在前面加 most;如:beautiful-more beautifulmost beautifuldifferentmore differentmost differenteasily

10、more easily-most easily注意：（1）形容詞最高級前通 常必須用定冠詞the,副詞最高級前可 不用.例句：The Sahara is the biggest desert in the world.(2 )形容詞most前面沒有the,不表示最高級的含義，只表示“非常IIIt is a most important problem.=It is a very important problem.有少數(shù)形容詞、副詞的比較級和最高級是不規(guī)則的，必須熟記.如:goodbetterbestwellbetter-bestbadwo rse 一 wo rstillworseworsto

11、ldolder/elderoldest/eldest many/muchmoremostlittlelessleastfar further/fartherfurthest/farthest二、形容詞、副詞的比較級和最 高級的用法. A + be+形容詞比較級+ than + B意思為A比B更.如:This tree is taller than thatone.這棵樹比那棵樹高.注意：在含有連詞than的比較級中, 前后的比較對象必須是同一范疇，即同 類事物之間的比較.在比較級前面使用much,表示 程度程度強得多”.如:A watermelon is muchbigger than an apple.v