8年级英语3-4单元讲解及习题.doc

34Unit3 Im more outgoing than my sister.Unit4 Whats the best movie theater?英语形容词比较等级有三个：原级，比较级和最高级。(1) 一般句式的构成： A + is / are+ 形容词比较级+ than + B如： She is taller than me.形容词比较等级形式变化有规则的和不规则的两种。规则变化1）单音节词末尾加-er（比较级），-est（最高级）【例】 原级 比较级 最高级 如：great greater greatest2） 单音节如以e结尾，只加-r（比较级），-st（最高级） 【例】 fine finer finest3）闭音节单音节词如末尾只有一个辅音字母，须先双写这个辅音字母，再加-er（比较级），-est（最高级） 【例】 big bigger biggest4）其它双音节和多音节词皆在前面加单词more和most。【例】 careful more careful most careful不规则变化 原级 比较级 最高级 good/well better best bad worse worst many/much more most little less leastfar farther/further farthest/furthest【例】 Li Ping is older than Wang Hai. 李平比王海年纪大。There are more students in Class One than in Class Two.一班比二班学生多。三、 重点与难点：1、 asas结构：你和汤姆是一样好的孩子。Youre a boy as good as Tom.=Youre as good a boy as Tom.2、 (1)tooto与 sothat sb.cant的句型转换：前者为简单句，主语只有一个，而后者为复合句，主语有两个，试比较：The man was too angry to be able to speak.The man was so angry that he wasnt able to speak.(2) tooto与 not enough to句型的转换：He is too young to get married.=He is not old enough to get married.4、 用比较级表示最高级：约翰是班里最高的男生。John is taller than any other boy in the class.John is the tallest boy in the class.5、 the more. the more.表示“越越”:The more books you read, the wider your knowledge is.6、 more and more.表示“越来越”:More and more students realized the importance of a foreign language 【考例】My parents _ doctors. A. both are B. all are C. are all D. are both 拓展：all表示“三者或三者以上全都”的意思，every指三个以上的人或物(含三个)，each指两个以上的人或物(含两个)。 练习：用all,both,every,each填空 1) My brothers and I are _l at school. 2) _ student may have one book. 3) _Tom and Jim are my good friends. 4) Three students are flying kites,they are_ in Class 1. 1. This box is_ that one.A. heavy than B. so heavy than C. heavier as D. as heavy as2 When we speak to people, we should be .A. as polite as possible B. as polite as possiblyC. as politely as possible D. as politely as possibly3 This book is_ that one, but_ than that one.A. as difficult as; expensive B. as more difficult as; more expensiveC. as difficult as; more expensive D. more difficult as; as expensive4 I think the story is not so _ as that one.A. interesting B. interested C. more interesting D. most interesting5 His father began to work_ he was seven years old.A. as old as B. as early as C. since D. while1. I think science is _ than Japanese.A. much important B. important C. much more important D. more much important( ) 2 This pencil is_ than that one. longest B. long C. longer D. as long( ) 3 My mother is no _ young.A. shorter B. longer C. little D. few( ) 4 These children are _ this year than they were last year.A. more tall B. more taller C. very taller D. much taller( ) 5 It was very hot yesterday, but it is_ today.A. even hotter B. more hotter C. much more hot D. much hot6. Mrs Black has got_ instead of getting any better.A. more bad B. a little worse C. much badly D. a lot of worse( ) 1 When we arrived, we found the meeting room crowded with_ students.A. quite a few B. only a few C. few D. a few quite2 The house is small for a family of six.A. much too B. too much C. very much D.so3 Through the window we can see nothing but _ buildings.A. tall very many B. very many tall C. very tall many D. many very tall4 -Whats your brother like?-He is_.A. a driver B. very tall C. my friend D. at school5 The jacket was so_ that he decided to buy it. ,A. much B. little C. expensive D. Cheap 6 Our classroom is_ larger than theirs.A. more B. quite C. very D. Much( ) 1 The earth is about_ as the moon.A. as fifty time big B. fifty times as big C. as big fifty times D. fifty as times big( ) 2 Your room is mine.A. twice as large than B. twice the size of bigger twice than D. as twice large as( ) 3 Your room is _ than mine.A. three time big B. three times big C. three times bigger D. bigger thr