人教版八年级英语下册Unit 7 What's the highest mountain in the world? Section A Grammar focus-4c 课件（32张PPT）

课件32张PPT。Unit 7
What's the highest mountain
in the world?
Section A
Grammar focus-4c
Learning aims:To understand the vocabulary of this lesson
To review comparative and superlative
To learn the differences between “as….as”, comparative and superlative Activity 1:comparative Ask two students to make comparisons about their shape.Activity 2: Superlative Ask four students to make comparisons about their hairstyle. Grammar focus— What’s the highest mountain in the world?
— Qomolangma.
— How high is Qomolangma?
— It’s 8,844.43 meters high. It’s higher than any other mountain.— Which is the deepest salt lake in the world?
— The Caspian Sea is the deepest of all the salt lakes.
— Did you know that China is one of the oldest countries in the world?
— Yes, I did. It’s much older than the US. The comparative and superlative of adj and advReview: 规则变化
1) 一般情况下，单音节或双音节的形容词/副词比较级＋er， 最高级＋est。如:
clever — cleverer — cleverest
few — fewer — fewest
small — smaller — smallest 等。 形容词、副词的比较级和最高级
规则变化和不规则变化2) 以e结尾的词，比较级＋r，最高级＋st 即可。 如：
nice — nicer — nicest
cute — cuter — cutest
large — larger — largest
3) 以辅音字母＋y结尾的变y为i＋er或est 如: easy — easier — easiest
happy — happier — happiest
再如：early, busy, heavy, dirty, lazy 也如此。 4) 重读闭音节，单辅音结尾的，双写这个辅音字母＋er 或 est的词：
fat — fatter — fattest
thin — thinner — thinnest
hot — hotter — hottest
red — redder — reddest
wet — wetter — wettest
big — bigger — biggest 5) 多音节和部分双音节的词需要在形容词
原级前＋more 构成比较级，＋the most 构
成最高级。如：
beautiful － more beautiful － the most beautiful
又如: delicious, popular, important, interesting, expensive, creative
双音节的词如: careful － more careful － the most careful useful － more useful － the most useful不规则变化：
good / well — better — best (好)
bad/badly — worse — worst (坏)
many/much — more — most （多）
little — less — lest few — fewer — fewest(少)
far — farther —farthest (距离远)
far — further — furthest (程度深)
大多数形容词有三个级
1. 原级:as ... as... 像..….一样
e.g. Tim is as tall as Tom.
2. 比较级 (用于两者之间的比较):形容词比较级＋ than ...
e.g. This box is bigger than that one.
3. 最高级(用于三者或三者以上的比较):the + 形容词的最高级＋of / in ...
e.g. Tom is the heaviest in our class. He is the most popular in our school形容词和副词的比较级和最高级句型
① 比较级修饰问题a little, a bit, even, still, much, a lot, far 等可修饰比较级。
e.g. Tom is a little taller than Jim. This book is much more interesting
than that one.Key points： 1.比较级考点② 同级比较
e.g. The weather in Beijing is colder
than that in Xi’an. Our school is bigger than yours.
③越来越......
比较级 + and + 比较级
e.g. It’s getting colder and colder.
b. the + 比较级 + 句子，the + 比较级 + 句子
e.g. The more you exercise, the better you are.
④ 选择疑问句（没有than的情况）
e.g. Who runs faster, Lucy or Lily? 2. 最高级考点
说明：形容词的最高级前必须加the；副词的最高级前省略the。
①在…范围之最
e.g. Tom is the tallest student in the class. Spring is the best season of the year.② “......之一”问题
e.g. Beijing is one of the biggest cities
in the world.
③ “the + 序数词 + 最高级”
e.g. I think he is the second tallest boy
in his class.比较级 +than + any other +名词单数
比较级 +than + the other+名词复数
比较级 +than + all the other+名词复数
比较级 +than + the rest of+名词复数
3.用比较级表示最高级的句型比较级和最高级的转换
e.g. Tom is the tallest student in the class.
= Tom is taller than any other student
in the class.
= Tom is taller than all the other
students in the class.
= No other students are taller than Tom.① as + adj./adv. + as
e.g. She is as thin as Lily.
He writes as carefully as Linda.
② not + as/so + adj./adv. + as
e.g. Tony didn’t run so fast as Carter. 4.同级比较1. Our family has bought a car so we can travel _____ than before. ??
most easily? ? B. less easily? ?
C. easily? ? D. more easily??
2. My father told me a story last night. It is ____ one I’ve ever heard. ??
the funniest? ? B. funniest? ?
C. funnier? ? D. the funnier? ?学以致用DA3. The _____ friends you have, the ____ you will be.? ?? ?? ???
A. more, happy? ? B. many, happy? ?
C. more, happier? ?D. many, happier
4. When he heard a cry for help, he ran out as _______ as he could.
hardly? ?? ? B. quickly? ?? ?
C. finally? ?? ? D. slowlyCB5. This place is not big enough for Lucy’s birthday party. We should find a _____ one. ??
big? ?? ?? ?? ??? B. small? ?? ?? ?
C. bigger? ?? ?? ?? ? D. smallerCFill in the blanks with the correct forms of the words in the box.big much popular long old high1. The Amazon River is one of the _______ rivers in the world. It’s a little _______ than the Yangtze River.
2. Qomolangma is 8,844.43 meters _____. It’s one of the most ________ places for serious mountain climbers.longestlongerhighpopular4a3. No ocean in the world is as _____ as the Pacific Ocean.
4. Although Japan is _______ than Canada, it is _______ smaller.bigoldermuch太平洋n. 大海；海洋Write two comparisons about two topics. Write true facts.Two rivers: _________________ and _________________
__________________________________________________________________________________________________________________________________________________________________________e.g. 4bThe Yangtze River is almost as long as the Amazon River.
The Amazon is longer than the Yangtze, but the Yangtze River is the longest river in China.the Yangtze Riverthe Amazon RiverWrite five questions using comparisons. Then ask your partner your questions.Writing1. _________________________________
2. _______________________________
3. _________________________________
4. _________________________________
5. _________________________________e.g.4cWhat is the highest building in our city? What is the busiest subway station in our city?What is the largest shopping mall in our city?Which is the biggest park in our city?Which is the longest road in our city?Exercises1. She is ________ than ________.
A. busier / us B. busier / we
C. more busy / us D. more busy / we
2. Jane is ________ than Betty.
A. less taller B. less tallest
C. less tall D. not as tall
3. China is ________ country in the world.
A. the third largest B. the largest third
C. the third large D. a third largest BAA4. — Which is ____ season in Beijing?
— I think it’s autumn.
A. good B. better C. best D. the best
5. — Which is ____, the sun, the moon or the earth?
— The moon is.
small B. smaller
C. smallest D. the smallest DD6. I study English as ____ as my brother.
A. hard B. harder C. hardest
7. Which is ____, a bicycle or a computer?
A. expensive B. more expensive
C. the most expensive
8. The Yellow River is one of ______ rivers in China.
A. long B. longer C. the longest ABCHomework Writing:
Make a survey and describe your family