Unit 7 Whats the highest mountain in the world Section A Grammar Focus -3c 课件人教版英语八年级下册.pptx

What’sthehighestmountainintheworld?

SectionAGrammarFocus

Grammarfocus

度量的表达

Thebasketballplayer

twometers

tall.

adj

tall

tall

high/wide/deep

形容词和副词的比较级和最高级

大多数形容词和副词都有三个级

1)原级:常用结构as...as...“和..….一样”

eg.ZhangHongisastallasTom.张红和汤姆一样高。

2)比较级(用于两者之间的比较)

常用结构：比较级＋than...

eg.HeistallerthanI.他比我高。

3)最高级(用于三者或三者以上的比较)，

常用结构:the+最高级+of/in/among...

eg.Heisthefunniestinhisclass.他是他们班最有趣的。

比较级，最高级的构成

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

clever－cleverer－cleverest

2)以e结尾的词，比较级＋r，最高级＋st

nice－nicer－nicest

3）以辅音字母＋y结尾的，变y为i＋est

easy－easier－easiest

比较级，最高级的构成

4)以一个辅音字母结尾的重读闭音节，双写辅音字母+er/est

fat－fatter－fattest

wet－wetter－wettest

5)多音节和部分双音节的词需要在原级前＋more构成比较级,或＋themost构成最高级

careful－morecareful－themostcareful

beautiful－morebeautiful－themostbeautiful

不规则变化：

good—better—best

well—better—best

bad/badly—worse—worst

many/much—more—most

little--less--least

far—farther—farthest(距离远)

far—further—furthest(程度深)

old—elder—eldest(长幼)

old—older—oldest(年龄)

常用结构/句式

Whoisthetallestinourclass?

Mikeisthetallestinourclass.

Mikeis__________anyotherstudentinourclass.

taller

than

Nostudentinourclassis___________Mike.

as

tall

as

Fillintheblankswiththecorrectformsofthewordsinthebox.

1.TheAmazonRiverisoneofthe_______riversinthe

world.It’salittle_______thantheYangtzeRiver.

2.Qomolangmais8,844.43meters_____.It’soneof

themost________placesforseriousmountainclimbers.

3.Nooceanintheworldisas_____asthePacificOcean.

4.AlthoughJapanis_______thanCanada,

itis_______smaller.

longest

longer

high

popular

big

older

much

Writetwocomparisonsabouttwotopics.Writetruefacts.

Tworivers:_________________and_________________

_____________________________