Unit7SectionA1a1c课件人教版八年级英语下册

What'sthehighestmountainintheworldSection

A

la-lcUnit7geographyclassmapglobeWhatisthelargestcontinentintheworldWhat'sthelongestriverintheworldWhat'sthedeepestsaltlakeintheworldWhat'sthebiggestdesertintheworldtheNiletheCaspian

Seathe

SaharaAsiaQomolangmaisthe

mountain.It's8848.86

meters

high/inheight.What'sthehighestmountainintheworldhighestItisan8848.86-meter-high

mountain.Qomolangma河TheNileisthe

river.It's6670kilometerslong/inlength.What'sthelongestriverintheworld地中海尼罗河,4030电费河红北同归线第三谋和第六溪布喀土穆

。白罗theNile加拉巴特埃寒俄比亚高原2010非

东海物longestIt'sa6670-kilometer-longriver.What'sthedeepestsaltlakeintheworldTheCaspian

Seais

the_

salt

lakes.It

is

1025metersdeep/indepth.the

Caspian

SeadeepestItisa

1025-meter-deepsalt

lake.中海撒

哈

拉

沙

漠同布子目海What'sthebiggestdesertintheworldItisabout9,060,000

squarekilometersinsize斯文高塌the

SaharaThe

Saharaisthe

biggest

desert.Doyouknowhowtoreadthesenumbers8,844.431,0256,6719,600,0002two2Otwenty200two

hundred2,

000two

thousand20,000twenty

thousand200,000twohundred

thousand2,000,000two

million20,000,000twenty

million200,000,000twohundredmillion2,000,000,000two

billioneight

thousand

eight

hundred

and

forty-fourpoint

four

threeonethousandandtwenty-fivesix

thousand

six

hundred

and

seventy-onenine

million

six

hundred

thousand143.7point/dotone

hundredandforty-three

pointseventhreehundred(and)twenty-sixmillion,four

hundred(and)fourteenthousand,seven

hundred(and)eighteensixmillionfivehundred

and

sixtythousandfourhundredand

eighty-fivetwohundred

andfortymillion

thousandread

these

numbers326,414,7186,560,485240Let'sfindtheregularitylong——the

longest——longerthan·deep——thedeepest——deeperthan·high——the

highest

——higher

thantheadj-est

=最…的形容词

adj.+er+than=

更…的the

largest—

largerthanthe

hotter

—hottestlargehot一些双音节词和多音节词在前面加more,most

来构成比较级和最高级。important(重要的)more

important

most

importanteasily(容易地)more

easily

most

easily以一个辅音字母结尾的闭音节单音节词，双写结尾的辅音字母，再加-er,-estnicestlargest

ablestnicerlarger

ablerbiggerLhotterreddernicelargeable以不发音的e结尾的单音节词只加-r,-stbighot

redbiggestreddestL1OLLESL不规则变化有一些词的比较级、最高级变化是不规则的，需要特殊记忆。good/well→better→bestbad/ill/badly→worse→worstmany

/much→more→mostlittle→less→leastQomolangmaabout

9,600,000

square

kilometers

in

sizeThe

Sahara1,025

meters

deepThe

CaspianSea6,671

kilometers

longThe

Nile8,844.43

meters

highlaMatch

the

factsknow.you1.Qomolangma

is

than

any

othermountainin

the

world.2.TheSaharais

desertintheworld.3.The

Caspian

Sea

is

of

all

thesalt

lakes.4.The

Nile

is

river

in

the

world.Listen

and

complete

the

sentences.higherthe

biggest

the

deepestthe

longestUsetheinformationin1btomakeconversations.A:WhatisthehighestmountainintheworldB:Qomolangma.theTibetan

Pl