英语人教版八年级下册Unit 7 Grammar Focus-4c.pptx

1、Grammar Focus,(二)形容词的比较级和最高级 Comparatives and Superlatives Degrees of Adjectives and Adverbs.,大多数形容词和副词有三个等级： 原级、比较级、最高级。 一、形容词比较级的构成 1.构成的不规则变化: 2.构成的规则变化:,形容词和副词的比较级,同级比较用 “as+形容词原形+as”，意为“和.一样”， 否定句中用“not so/as +形容词原形+as”， 意为“不如.” e.g. China is almost as big as the USA. 中国几乎和美国一样大。,1. 构成的不规则变化: e

2、.g. good / well better best bad / badly worse worst many / much more most little less least far farther / further farthest/ furthest,2. 构成的规则变化: 1) 单音节词和少数双音节词一般在词尾 后加-er 构成比较级 或-est构成最高级. 如： 原级 比较级 最高级 cold colder coldest bright brighterbrightest young younger youngest,2) 以字母 e 结尾的词只加 r 或-st 构成 比较级

3、和最高级。 原级 比较级 最高级 nice nicer nicest fine finer finest large larger largest,3) 重读闭音节词末尾只有一个辅音字母 时, 先双写这个辅音字母, 再加-er或-est。 如: big bigger biggest thin thinner thinnest 4) 以“辅音字母+ y”结尾的双音节词， 先改y为i, 再加-er或-est。如： easy easier easiest happy happier happiest,5) 多音节词和部分双音节词在词前加more或most。如： delicious more deli

4、cious most delicious interesting more interesting most interesting importantmore important most important,1. good 2. comfortable 3. big 4. happy 5. cheap 6. many 7. difficult 8. little,better best more comfortable most comfortable bigger biggest happier happiest cheaper cheapest more most more diffi

5、cult most difficult less least,形容词和副词比较级的用法,1.表示两者之间的选择, 可用“Which/Who+be + 比较级，A or B?”.,2.表示两者之间的比较，通常用连词 than 引导， 表示“更.一些”,3.much/far/a lot, even ,still ,a little/a bit 修饰比较级, 表示程度.,e.g. Who is taller, Tom or John?,e.g. He runs faster than she.,e.g. He runs much faster than she.,4. “比较级+and+比较级”表示

6、“越来越”,5. “the+比较级 , the + 比较级”表示“ 越, 越 ”,6. 表示不及另一方时，用“less+原级+than” (双音节和多音节词),e.g. He becomes healthier and healthier.,e.g. The more you exercise, the healthier you will be.,e.g She is less healthy than he.,e.g. He is healthier than she.,1.比较级 + and +比较级 越来越 2.the+比较级 , the + 比较级 越, 越 ,3._you are,

7、 _mistakes you will make. (你越仔细，做错的题目就越少） 4. _you eat, _youll be.(你吃得越多,就越胖) 5. Alice writes well. Mary writes _ than she. (甚至更好）,The more careful,the fewer,The more,the fatter,1.The girl becomes _. (越来越漂亮）,more and more beautiful,2. The weather is getting _. (越来越槽糕）,worse and worse,even / still bet

8、ter,同义句转换,1. Flat A is more expensive than Flat B Flat B is _ _ than Flat A. Flat B is _ _ Flat A. Flat B is not _ _ _ Flat A.,2.He is the tallest student in the class. He is _ in the class.,taller than any other student,any other +名词单数,less,expensive,cheaper,than,as,expensive,as,用法：英语中三者或三者以上相比较，表示

9、 “最” 这样的最高程度概念时，要用 “the+最高级” 的结构表示。这种句式一般带有表示比较的介词短语，比如: in our class, of the three 等。 e.g.：Wang Lin is the tallest in our class. This theater is the cheapest of the three.,形容词的最高级,1.表示三者或三者以上比较,可用”Which/Who +最高级, A , B or C ?”表示.,3.one of +,形容词最高级,+名词复数表示“最 之一”,2. the+序数词+最高级+单数名词+范围“.是.的第几.”,形容词和副

10、词的最高级的用法,e.g. Who is the tallest, Tom , Mike , or Jack?,e.g. Mike is the second tallest student in our class.,e.g. Jack is one of the tallest students in our class.,4. 当最高级前有物主代词或名词所有格时， 不加定冠词the e.g. Monday is my busiest day . Jack is Jims best friend.,3. Li Ming is _ in the class because he never

11、gets to school on time. （最懒的学生之一）,one of the laziest students,The Yangtze River is_ river in the world. (第三长河）,the third longest,2. The Atlantic is _ocean in the world. ( 第二大洋）,the second biggest,一、翻译句子：,1. Lily gets up _ (early) than Lucy. 2. Which goes _ (slowly), Tom or Jim? 3.This book is _ (int

12、eresting) than that one.,earlier,more slowly,more interesting,二 根据所给词的适当形式填空,4. She works _ (careful) in her school. 5. Who goes to bed _ (late) Jim, Tom or Jack? 6. I think turkey is _ (delicious) of all.,the most carefully,latest,the most delicious,The Yellow River is long. The Yangtze River is a

13、lot _ than the Yellow River. The Nile is _ of all.,longer,the longest,Make sentences using the information in the forms.,Exercise,The Yangtze River is not _ long _ the Nile. = The Yangtze River is not _ (shorter)than the Nile.,as as,longer,Mount Tai is high. Mount Huang is a little _ than Mount Tai.

14、 Qomolangma is _ of all.,Mount Tai is not _ high _ Qomolangma. = Mount Tai is not _ (shorter)than Qomolangma.,higher,the highest,as as,higher,1. The population of Singapore is large. 2. The population of Malaysia is much _ than that of Singapore. 3. The population of China is _ of all.,larger,the la

15、rgest,4. The population of Singapore is not _ large _ that of China. 5. The population of Singapore is not _ than that of China.,as,larger,as,1. Paul is very _ . He is _ than his brother . A. heavy - heavierB. heavy - heavy C. heavier - heavier D. heavy-heavyer 2. It has the _ clothing store in the

16、town. A. goodest B. gooddest C. best D. better 3. This ruler is _ than that one. A. long B. longer C. the longest D. longest 4. This book is _ of all. A. cheapest B. cheap D. cheaper D. the cheapest 5. He is much _ than his brother. A. taller B. tall C. the tallest D. tallest 6. Li Lei is _ older than Lucy. A. quite B. very C. much D. more,7. This is one of _ films of this year. A. more exciting B. exciting C. the most exciting D. most exciting 8. The weather in Beijing is colder than_. A. in Guangzhou B. Guangzhou C. that in Guangzhou D. that from Guangzh