八年级英语上Units3-4形容词和副词的比较级与最高级

1、形容词和副词的形容词和副词的 比较级和最高级比较级和最高级8a-Units3-4 bigbiggerLook at the pictures and Look at the pictures and understand understand 看图并理解Look at the pictures and Look at the pictures and understand understand 看图并理解bigbiggerbiggestfastLook at the pictures and Look at the pictures and understand understand 看图并理

2、解fastfasterLook at the pictures and Look at the pictures and understand understand 看图并理解fastfasterfastestLook at the Look at the pictures pictures and understand and understand 看图并理解一、形容词和副词的原级、比较级、最高级的含义大多数形容词和副词有三个等级：原级、比较级和最高级。1.原级，及原形；2.比较级，表示“更”,用于两者（人或事物）之间的比较；3.最高级，表示“最”，用于三者或者三者以上（人或事物）之间的比较

3、。补充补充1 1：由由“动词动词+后缀后缀-ing / -ed ”构成的形构成的形容词，在词前加容词，在词前加eresting-more interestingmost interesting exciting-more excitingmost exciting bored-more bored most exciting relaxed-more relaxed most relaxed补充补充2 2：由形容词由形容词+后缀后缀 -ly 构成的副词，在该副构成的副词，在该副词前加词前加more most. slowly-more slowlymost slowly

4、happily-more happily most happily differently-more differently most differentlyimportant _ _ easy_ _ wet_ _ happy_ _ careful _ _ thin _ _ good_ _ hot _ _ easily _ _ many_ _ nice _ _ big _ _heavy_ _delicious_ _much_ _给出下列词的比较级和最高级给出下列词的比较级和最高级 more importantmost importanteasiereasiestwetterwettesthap

5、pierhappiestmore carefulmost carefulthinnerthinnestbetterbesthotterhottestmore easilymost easilymoremostnicernicestbiggerbiggestheavierheaviestmore deliciousmost deliciousmoremost见英语书见英语书P115形容词和副词的比较级和最高级的用法形容词和副词的比较级和最高级的用法 及常及常用用句型：句型：（1）前者程度超过后者用）前者程度超过后者用比较级比较级： A+比较级比较级+than+ B He is taller th

6、an she.形容词的比较级可以有much,a little ，a lot ,even, far 等表示程度的词来修饰，用以加强语气。 You look a little thinner than last year. （2）三个或三个以上比较用三个或三个以上比较用最高级最高级： A+ (the) +最高级最高级+of/in+范围范围 He is the tallest in his class.More examples:1.He is the youngest of all the children.2.The Changjiang River is the longest river i

7、n China.3.The city is one of the most beautiful cities in the world.4.Lucy is one of the tallest girls in her class.5.Give my best wishes to you.6.He is my best friend.1 He gets up a little_ than I. (early)2 You do the work _ than Tom. (well)3 She is much _ than her brother. (short)4 This picture is

8、 _ than that one .(beautiful)5 Which is _,the sun or the moon? (big)earlierbettershorter more beautifulbigger用所给形容词或副词的适当形式填空：用所给形容词或副词的适当形式填空： 1. 这个盒子比那个重。这个盒子比那个重。 This box is _ _that one. 2. 你下次一定要做得更好。你下次一定要做得更好。 You must _ _next time. 3.谁想去最远的那个公园谁想去最远的那个公园? Who wants to go to _ _ park? 4.你的妹妹看

9、起来比以前要高得多你的妹妹看起来比以前要高得多Your sister looks than before.heavier than do betterthe farthest完成句子：完成句子：much tall四、形容词或副词比较级特殊用四、形容词或副词比较级特殊用法法1.“比较级+and+比较级”或“more and more + 原级（多音节或部分双音节词）”意为“越来越.”。 My brother is taller and taller. Our city is becoming more and more beautiful. He is running more and more

10、 slowly.2.“the + 比较级+句子，the +比较级+句子”意为“越.,就越.”. The more you read,the more you know. The more vegetables you eat,the healthier you will be.3.“the +比较级+of the two”表示“两个中比较.的”。 The blue sweater is the cheaper of the two. 这件蓝色的毛衣是两个中比较便宜的。 The little boy is the taller of the two.4.“比较级+than any other+单

11、数名词”表示“比任何其他的.都.”. Tom is taller than any other boy in his class. Tom比他们班里其他任何一个男孩都高。 The red ball is bigger than any other ball in the box.5. “Which / Who is +比较级 ，A or B ? ” A和B中哪一个/谁更. Which is bigger ,the sun or the moon? Who is more beautiful , Lily or Lucy?6.表示“大几岁”、“长几米”之类的比较级时，用 “数量+比较级+than

12、”。 I am two years older than my brother.This street is 100 meters longer than that one. He is two centimeters taller than me.7 .表示表示“是是的几倍的几倍”，用，用“倍数倍数+as+原级原级+as”结构，或者结构，或者“倍数倍数+比较级比较级+than”结结构。构。 eg: This classroom is three times as big as that one. This classroom is twice bigger than that one.形容词

13、和副词比较级的用法形容词和副词比较级的用法 1.Who runs faster, he or she?2.He runs faster than she.3.He runs much faster than she.4.He becomes healthier and healthier.5.The more you exercise, the healthier you will be.6.She is less healthy than he.1.表示两者之间的选择表示两者之间的选择, 可用可用“Which/Who + 比较，比较，or?”.3.much/far/a lot, even ,

14、still ,a little/a bit 修饰比较级修饰比较级,表示程度表示程度.Who runs faster, he or she?He runs faster than she.He runs much faster than she.4. “比较级比较级+and+比较级比较级”表示表示“越来越越来越”5. “the+比较级比较级 , the + 比较级比较级”表示表示“ 越越, 越越 ” 6. 表示不及另一方时，用表示不及另一方时，用“less+原级原级+than” (双音节和多音节词双音节和多音节词)He becomes healthier and healthier.The mo

15、re you exercise, the healthier you will be.She is less healthy than he.He is healthier than she.Shanghai is becoming more and more modern.1.The new building is higher than the old one.Those apples are bigger than these ones.2.His shirt is more expensive than mine.如果主语是物主代词如果主语是物主代词+名词，那么后面要用名词，那么后面要

16、用名词性物主代词。名词性物主代词。比较级必须在同类中进行，即人与人比，比较级必须在同类中进行，即人与人比，物与物比，而且比较结构前后的词语要对称，物与物比，而且比较结构前后的词语要对称，特别注意在特别注意在than或或 as 之后不要漏掉可能出现之后不要漏掉可能出现的替代词的替代词 that ，those, one ,ones. 五、注意五、注意The weather is hotter in Chongqing than that in Guizhou.3.Kate is more beautiful than Lily is. She is five years older than I

17、am. I drink more tea than he (does).than前后句子的时态相同。通常用前后句子的时态相同。通常用be动词动词情态动词情态动词can, may, must, could, should和助动和助动词词do, does ,did, will，have等来简答。等来简答。4.I have more pens than you (do).many,much,little,few等词必须带名词。等词必须带名词。5.The city is one of the most beautiful cities in the world.one of+ the+最高级最高级+复

18、数名词复数名词 Which/Who+ 比较级，比较级，A or B? Which/Who+ 最高级，最高级，A ，B or C?6.Who is older, Jim or Tom ? Who is the tallest, Jim , Mike or Tom Which language is _ , English, French or Chinese?A. difficult B. more difficult C. the most difficultC7. Mary is the tallest of all the sisters in the family .在使用形容词最高级时

19、，一定要把自己包括在使用形容词最高级时，一定要把自己包括 在比较的范围内。在比较的范围内。8.This is the third largest city in China . 当表示当表示“第二，第三第二，第三”等意思时，经常在最高等意思时，经常在最高级的前面加级的前面加second, third,等词。等词。 9.Its our largest machine in our factory. 当最高级前有物主代词修饰时，其前不加当最高级前有物主代词修饰时，其前不加定冠词定冠词the. 六、原级比较六、原级比较 见英语书见英语书P115P115 as.as.意为意为“与与.一样一样.”否定：

20、否定：“not as /so.as.”意为意为“不如不如., ”，或或“与与.不一样不一样.”, =“less+形容词形容词/副词副词+than”.但但as/so.as中间用形容词或副词的中间用形容词或副词的原级原级。1.This room is as big as that one.2.This room is not as/so big as that one.=This room is smaller than that one.=That room is bigger than this one.Follow ups(随堂练习)1、-Mr Zhou, all of the studen

21、ts in our group, who lives _? -I think Li Lei does. A. fat B. father C. farthest D. farest2、The Changjiang River is _ than any other river in China. A. shorter B. longer C. shortest D. longest3、Bob never dose his homework _ Mary. He makes lots of mistakes. A. so careful B. as carefully as C. carefully as D. as careful as4、_ she