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1、Unit 4 Our WorldTopic 1 Plants and animals are important to us.Section A What can we see in the countryside?cowcountryside n.农村，乡下horsehensheepsome sheepWhat can we see in the countryside?goosesome geeseWhat can we see in the countryside?mousesome miceWhat can we see in the countryside?Look,listen a
2、nd say(影片影片1)small big The mice are smaller than the hens.The hens are smaller than the geese.The mice are the smallest of all.The hens are bigger than the mice.The geese are bigger than the hens.The geese are the biggest of all.small bigthin The ducks are a little thinner than the geese.The ducks a
3、re much thinner than the pigs.thin adj.瘦的；薄的；稀的瘦的；薄的；稀的单音节及部分双音节形容词比较级（单音节及部分双音节形容词比较级（-er）和最高）和最高级（级（-est）的规则变化。）的规则变化。AdjectivestrongtallnicebraveComparativestrongernicerSuperlativestrongestnicestAdjectivebigfatthinlazyuglyComparativebiggerlazierSuperlativebiggestlaziest下列形容词比较级和最高级变化有什么规律？下列形容词比较
4、级和最高级变化有什么规律？下列形容词比较级和最高级变化有什么规律？下列形容词比较级和最高级变化有什么规律？单音节及部分双音节形容词比较级（单音节及部分双音节形容词比较级（-er）和最高）和最高级（级（-est）的规则变化。）的规则变化。1 一般在词尾直接加一般在词尾直接加er/est:talltallertallest2 以以e 结尾的单词去结尾的单词去e加加er/est:widewiderwidest3 以辅音字母加以辅音字母加y结尾的单词，结尾的单词，把把y改成改成i,再加再加er/est:busybusierbusiest4 以重读闭音节结尾，且末尾只有一个辅音字母的单以重读闭音节结尾，
5、且末尾只有一个辅音字母的单 词，双写末尾的辅音字母，再加词，双写末尾的辅音字母，再加er/est:bigbiggerbiggest (fat,thin,red,hot)单音节及部分双音节形容词比较级（单音节及部分双音节形容词比较级（-er）和最高）和最高级（级（-est）的规则变化。）的规则变化。AdjectivestrongtallnicebraveComparativestrongernicerSuperlativestrongestnicestAdjectivebigfatthinlazyuglyComparativebiggerlazierSuperlativebiggestlazie
6、stthinnerthinnestuglierugliestfattertallertallestbraverbravestfattest2bWork aloneAct as different animals on the farm to continue the conversation,using comparative and superlative degrees of adjectives in the table.countrysideThe air is fresh.The sky is blue.The trees are green.The river is clear.I
7、ts quiet in the countryside.The air is The air is dirtydirty.The river is dirty.cityThe buildings are The buildings are talltall.The roads are The roads are widewide.The traffic is The traffic is busybusy.Its noisy in the city.The air in the countrysideThe air in the countryside is _is _The sky in t
8、he countrysideThe sky in the countryside is _is _The river in the countrysideThe river in the countryside is _is _The trees in the countryside are _ than The trees in the countryside are _ than thosethose in the city.in the city.Its _ in the countryside than in the city.Its _ in the countryside than
9、 in the city.than than thatthat in in the city.the city.greenergreenerquieterfresherbluerclearer1aLook,listen and sayWhere does Wang Wei like to live better,a countryside or a city?（影片2）Listen and fill in the blanks with the correct words according to 1a.How does Wang Wei think of the countryside?Wh
10、at about Michael?Wang Wei goes there for his summer vacation every year.Wang Wei likes the countryside very much.He thinks the air is _,the sky is _ and there are also _ trees and _ rivers there.fresher bluergreenerclearer quieterMichael thinks it is _,too.And people can enjoy the beauties of nature
11、 there.（录音1）3（影片3）Make a survey in groups.Find out how many students like countrysides and how many students like cities.Group workSummary 1.The comparative and superlative degrees of adjective.形容词比较级，最高级的规则变化形容词比较级，最高级的规则变化及用法。（及用法。（-er/-est）2.Talking about animals and describing nature.Homework Draw a picture of your hometown and write a passage about it,using adjectives and their comparative and superlative degrees.Thanks for Thanks for listening!listening!Goodbye!Goodbye!