Chapter 3 Environment

Chapter 3 Environment（通用2篇）

Chapter 3 Environment 篇1

　　using adjectives teachingaims1.       get the students to continue to learn the use of adjections.2.       get the students to practise using adjections.在上一单元，我们学习了形容词的三大功能（即：定语、表语和宾语补足语）和两个句型（即：it’s + 形容词+ ( for sb) + to do … / 主语 + be + 形容词 + to do…）。我们还学习过形容词的其他用法，如：形容词的比较等级的用法。( 注意：副词也有比较等级，副词的比较等级用法和形容词相同)形容词的比较等级是初中英语的重要语法项目，也是中考的热点问题。现在我们就形容词和副词的比较等级的常考知识点作复习和归纳。 i.  形容词的比较等级：大多数的形容词有三个等级：原级，比较级和最高级。原级即形容词的原形。比较级和最高级的变化，分规则变化和不规则变化两种。（1）       规则变化。单音节词和部分双音节词的变化如下表：

　　构成法

　　原级

　　比较级

　　最高级

　　一般加-er, est

　　long

　　cold

　　longer

　　colder

　　longest

　　ccoldest

　　以 结尾的词，只加-r , -st

　　nice

　　large

　　nicer

　　larger

　　nicest

　　largest

　　以一个辅音字母结尾，前面的元音读短音时，要双写结尾的辅音字母，再加-er , -est

　　big

　　fat

　　bigger

　　fatter

　　biggest

　　fattest

　　以辅音字母加 结尾的词，改y 为 i ，再加-er , -esteasy

　　busy

　　easier

　　busier

　　easiest

　　busiest部分双音节词和多音节词，在前面加    或   来构成比较级和最高级：原级                  比较级               最高级slowly                more slowly          most slowlybeautiful              more beautiful       most beautiful（2）      不规则变化如下表：原级比较级最高级good , wellbetterbestbad , ill worseworstmany , muchmoremostlittlelessleastfarfarther, furtherfarthest , farthestoldolder , elderoldest , eldestii. 形容词和副词比较等级的用法：（1）       表示两者之间的比较时，用“形容词比较级 + than”句型。the sun is bigger than the earth.（2）      表示两者以上的比较时，用“the + 形容词最高级（ + 名词）+ of(in)… “的句型。my brother is the tallest in his class. (3) 表示两者是同等程度，用“as +形容词原级/ 副词 + as”句型, 意思是“ 和…… 一样”。表示两者不同程度时，用“not so (as) + 形容词原级 / 副词 + as”的句型，意思是“不如……”.它可与比较级互换。this book as good as that one.li ping is not as old as wei fang.swimming is not as interesting as fishing. = fishing is more interesting than swimming.试分析下列练习：1.       my coat is _________ than yours.a. expensive   b. more expensive   c. much more expensive   d. much expensive 2.       shanghai is one of _________ cities in our country.a.large   b. larger   c. largest   d. the largest3.       which subject is __________ , math or english?a.easy   b. easier   c. easyer   d. easiest4.       of all the students in our class, betty write _________.a. very careful   b. the most careful   c. the most carefully   d. more carefully5.       jack doesn’t jump so _________ as his brother.a. high   b. higher   c. highest   d. more high6.  it was ________ cold yesterday.   a. terrible   b. terribly   more terrible    d. most terrible(4) 常用的一些原级比较的结构还有：1. “as many / much as” 意思为“同数量的…… ; 一样多”。    he has as much money as john.    you can sell as many newspapers as i.2. “ as many / long / high … as + 数字”表示“多达 （ 长达、高达）……”.。    i have learned english for as long as 15 yeaars.    the building costs ran up to as much as 20 million yuan.3. the same as / different from / like; 当我们要表达“某一事物与另一事物相同时，用“ a is the same as b”句型。当我们要表达某一事物和另一事物不同时，用“a is different from b” 句型。当我们要表达某一事物与另一事物相像时，用“a is like b” 句型。    my watch is the same as yours.    tom’s coat is different from nick’s.    mr wang’s car is like my father’s.  这三个结构中所使用的动词多为be, 但有时也用look, sound, taste, seem 等系动词。that girl looks like her mother.this song sounds different from the one i like.   the same as 也可分解为the same ……as, same 后面通常跟age, kind, length, colour, height, size, amount 等名词。有时the same … as 也可与as … as 互换使用。      the ruler is the same length as that one. = this ruler