外研版必修1Module 5 A Lesson in a Lab课文配套ppt课件

这是一份外研版必修1Module 5 A Lesson in a Lab课文配套ppt课件，共40页。PPT课件主要包含了Module 5，as tall as，less often，英语越来越重要了，相当于，Example，-20℃，-5℃，Mount Tai ，my house等内容，欢迎下载使用。

1. 原级比较：两者程度相同。用句型as+ 形容词/副词+as表示, 否定名式为: nt as/s+形容词/副词as。
e.g. Anne is ________ his brther. 安与他的哥哥一样高。 I have never seen a persn __________________ 我从没见过哪个人跟他一样聪明。
形容词和副词比较等级的用法
as / s clever as he is.
2. 比较级：A. 表示A超过B。此时用形容词和副词的比较级。
e.g. ________________________________ 我们的教室比你们的更明亮。 I dn’t think math is mre imprtant than physics. __________________________
Our classrm is brighter than yurs.
我不认为数学比物理更重要。
B. 表示A不如B。 句型：less+形容词 /副词原级。
e.g. Rabbits ___________ than dgs. 兔子不如狗跑得快。 It rains ________ here in autumn than in spring. 这里秋季的雨天不如春季多。
ran less fast
3. 形容词和副词比较级的特殊用法越来越…… 比较级+ and+比较级
e.g. Yu are grwing ______________. 你越长越高了。 English is becming mre and mre imprtant. _________________
taller and taller
B. 越……， 就越…… the +比较级+ the +比较级e.g. _______________ yu are, the better yu will d in the exam. 你越细心，就会考得越好。 The mre yu practice, ____________________________ 你练得越多，讲得就越流利。
The mre careful
the mre fluently yu will speak.
C. 表示两者之中比较……的一个，用 f 引导，比较级前加上the。 e.g. Jack is ___________ the tw brthers. 杰克是兄弟两中较高的一个。 This is ___________ the tw rms. 这个房间是两个中较大的一个。
the taller f
the bigger f
D. n mre than表示“只；不超过；不 多于”，相当于nly。e.g. His whle schl added up t ____________________ 他所接受的学校教育不过一年。 She has ____________________ in her pcket. 她兜里只有一块钱。
n mre than ne year.
n mre than ne yuan
E. n mre…than 表示“……一样不……”；而nt mre…than则表示“不像……那样”，相当于“nt s …as”。e.g. Hs is feeling ____________ yesterday. 他觉得不比昨天好多少。
n better than
She is nt mre generus than her yunger sister. 她不如她妹妹那样慷慨大方。She is ________________ her yunger sister.
nt s generus as
F. n less than表示“多达，……那样多; 至少, 起码”, 相当于as much /many as, 蕴含这个数是大的；而nt less than表示“不少于”, 不强调这个数的大小, 只说明数据本身。e.g. I have ________________________. 我起码有10本字典。（至少）
n less than ten dictinaries
I have nt less than ten dictinaries._____________________
（不含“我的词典多”的意思，只说明一个事实。）
G. n less …than表示“不比……差；与……同样地”， 相当于“as …as”。 e.g. She is ___________________ her sister. 她和她的姐姐一样漂亮。
我有的词典不少于10本。
n less beautiful than
H. 不用比较级的形容词如：senir, junir, superir, inferir等。e.g. He is three years ___________ 他比我大三岁。 Yur knwledge f electrnics is ____________________ 你对电子学的知识远远超过我。
senir t me.
much superir t mine.
I. 比较级的修饰语。通常为副词或短语，置于比较级前面， 说明比较级的程度。a little, little, a bit, bit, a lt, a great deal, much, far, rather, slightly, by far, even, still, nearly, almst, any, just, (…) times等。
e.g. The mn is much smaller than the earth. The result f the experiment turned ut t be even better than expected. Speak a bit mre slwly, please. The utput f the paper mill is three times higher than it was last year.
Make sentences abut the cmparative sizes f the pairs. Use the wrds in the brackets.
Yangtze River
Snghua River
6,300 kilmeters
2,309 kilmeters
A: The Yangtze River is abut three times as lng as the Snghua River.
B: The Yangtze River is abut three times lnger than the Snghua River.
C: The Yangtze River is abut three times the length f the Snghua River.
Winter in Harbin
Winter in Beijing
(cld/cldness)
A: Winter is fur times as cld in Harbin as in Beijing.
B: Winter is fur times clder in Harbin than in Beijing.
C: Winter in Harbin is fur times the cldness f in Beijing.
Munt Qumlangma
(high/height)
A: Munt Qumlangma is abut six times as high as Munt Tai .
B: Munt Qumlangma is abut six times higher than Munt Tai .
C: Munt Qumlangma is abut six times the height f Munt Tai .
my aunt’s huse
80 square meters
160 square meters
A: My aunt’s huse is twice as large as my huse.
B: My aunt’s huse is twice larger than my huse.
C: My aunt’s huse is twice the size f my huse.
Lily weighs
45 kilgrams
90 kilgrams
heavy/weight
A: Tm weighs ver twice as heavy as Lily.
B: Tm is ver twice heavier than Lily.
C: Tm is ver twice the weight f Lily.
②倍数+形容词比较级 +than …
③倍数+the (size, height, length, weight, width, depth, age) +f …
①倍数（half, nce, twice,…times）+ as + 形容词+as
Use the wrds belw t write sentences as in the examples.
Example:temperature / get / lwThe temperature gets lwer and lwer.1. ht metal / get / big The ht metal is getting bigger and bigger.
2. magnesium / get / ht The magnesium is getting htter and htter.3. sun / get / strng during the mrning The sun is getting strnger and strnger during the mrning.4. sea / becme / warm The sea is becming warmer and warmer.
Underline the cmparative expressins. B. Circle the adverbs used t give mre infrmatin abut the cmparative expressins.
Lk at the fllwing sentences, and:
1. Cme a bit clser.2. We need rather mre than that.3. It weighs a little mre than befre.4. It’ll be a lt heavier than magnesium.5. Is it any heavier?6. We need a piece which is (very) much bigger than that.
Cmpare the items / peple yu knw. Use ne f these expressins.
Example: Tw lessnsThe physics lessn was a lt mre interesting than the chemistry lessn.
a little a bit a lt rather n any (very) much lts
1. Debbie长得很快，她个子越来越高。 Debbie is grwing fast. She’s getting ______________. 2. 我们图书馆藏书的数量是你们图书馆的四倍。 The bks in ur library are ______________ than thse in yurs．
Fill in the blanks.
fur times mre
3. 这本词典的厚度比你从图书馆借的那本厚4倍。 This dictinary is ________________ as the ne yu brrwed frm the library.
fur times as thick
4. 地球的体积是月球的49倍。 The earth is 49 times _________ the mn.5. 天气越暖和，我感到越舒服。 ___________ the weather is, ________ I feel.
每空填一词，使句子的意思相同或相近。1. The newly-built bridge is tw times as wide as that ne. The newly-built bridge is three times _____ _____ that ne.  2. Mary weighs 50 kilgrammes, and Paul weighs 100 kilgrammes.       Paul is _____ _____ _______ than Mary.
tw times heavier
wider than
3. I think that the city is mre attractive than the suburb t yung peple.   I think that the suburb is _____ _________ ______ the city t yung peple. 4. Nigeria is abut fur times the size f Great Britain. Nigeria is abut fur times ____ _____ ____ Great Britain. 
as large
attractive than
D exercises 1-4 n page 91.