课件30张PPT。外研版
高一年级 (必修1)
Module 5Module 5
A Lesson in a Lab1. 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: not
as/so+形容词/副词as。 e.g. Dick is as tall as his brother.
Tom speaks as quickly as his cousin.
I have never seen a person as / so clever as he is.形容词和副词比较等级的用法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. Our classroom is brighter than yours.
Dogs run faster than rabbits.
I don’t think math is more important than physics.B. 表示A不如B。 句型:less+形容词
/副词原级。e.g. Rabbits ran less fast than dogs.
Jenny is less clever than her sister.
It rains less often here in autumn
than in spring.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. You are growing taller and taller.
你越长越高了。
English is becoming more and more
important.
英语越来越重要了。B. 越……, 越……
the +比较级+ the +比较级
e.g. The more careful you are, the better you will do in the exam.
你越小心,就会考得越好。
The more you practice, the more fluently you will speak.
你练得越多,讲得就越流利。C. 表示两者之中比较……的一个,用 of 引导,比较级前加上the。
e.g. Jack is the taller of the two brothers.
杰克是兄弟两中较高的一个。
This is the bigger of the two rooms.
这个房间是两个中较大的一个。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 lot, a great deal, much, far, rather, slightly, by far, even, still, nearly, almost, any, just, (…) times等。e.g. The moon is much smaller than the earth.
The result of the experiment turned out to be even better than expected.
Speak a bit more slowly, please.
The output of the paper mill is three times higher than it was last year. Make sentences about the comparative sizes of the pairs. Use the words in the brackets.Yangtze RiverSonghua River6,300 kilometers2,309 kilometerslong/lengthExample:A: The Yangtze River is about three
times as long as the Songhua River.B: The Yangtze River is about three
times longer than the Songhua River.C: The Yangtze River is about three
times the length of the Songhua River.Winter in HarbinWinter in Beijing-20℃-5℃(cold/coldness)A: Winter is four times as cold in Harbin
as in Beijing.B: Winter is four times colder in Harbin
than in Beijing.C: Winter in Harbin is four times the
coldness of in Beijing.Mount Tai Mount Qumolangma1521m8848m(high/height)A: Mount Qumolangma is about six
times as high as Mount Tai .B: Mount Qumolangma is about six
times higher than Mount Tai .C: Mount Qumolangma is about six
times the height of Mount Tai .my housemy aunt’s houselarge/size80 square meters160 square metersA: My aunt’s house is twice as large as my house.B: My aunt’s house is twice larger than my house.C: My aunt’s house is twice the size of my house.Lily weighsTom weighs45 kilograms90 kilogramsheavy/weightA: Tom weighs over twice as heavy as Lily.B: Tom is over twice heavier than Lily.C: Tom is over twice the weight of Lily.②倍数+形容词比较级
+than …③倍数+the (size, height,
length, weight, width,
depth, age) +of …Conclusion①倍数(half, once,
twice,…times)+ as +
形容词+asUse the words below to write sentences as in the examples.Example:
temperature / get / low
The temperature gets lower and lower.
1. hot metal / get / big
The hot metal is getting bigger and
bigger.2. The weather / get / hot
The weather is getting hotter and hotter.
3. sun / get / strong during the morning
The sun is getting stronger and stronger during the morning.
4. sea / become / warm
The sea is becoming warmer and warmer. Underline the comparative expressions.B. Circle the adverbs used to give more information about the comparative expressions.Look at the following sentences, and:1. Come a bit closer.
2. We need rather more than that.
3. It weighs a little more than before.
4. It’ll be a lot heavier than magnesium.
5. Is it any heavier?
6. We need a piece which is (very) much bigger than that.1. Debbie长得很快,她个子越来越高。
Debbie is growing 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 books in our library are
______________ than those in yours.Fill in the blanks.taller and tallerfour times more3. 这本词典的厚度比你从图书馆借的那本厚4倍。
This dictionary is _________________ as the one you borrowed from the library.four times as thick4. 地球的体积是月球的49倍。
The earth is 49 times _________ the moon.
5. 天气越暖和,我感到越舒服。
___________ the weather is, _________ I feel.the size ofThe warmerthe better