1. Structures of comparison structures ( 形容词或副词各级别句式 )

Grammar

Degrees of comparison

1)as + adj./ adv. + as.The layout （设计） of Class One’s wall newspaper is as beautiful as that of Class Three’s.as + adj. + a + n. + asThis is as good a dormitory building as the other.as + many / much + n. + as I have as much experience as you in doing the work.

2) not as/so + adj./ adv. +asThe bedroom is not as big as the sitting room.3) the -er form + thanMost people think detective stories are more interesting than science fiction.4) the + -est form This is the largest supermarket in our neighborhood.

1.The earth is forty-nine times larger than the moon.

2.The earth is forty-nine times as large as the moon.

3.The earth is forty-nine times the size of the moon.

Look at the sentences

② 倍倍倍倍 ++ 形容词比较级形容词比较级 +as …+as …

③ 倍倍倍倍 +the size ( height, length, weight, +the size ( height, length, weight, width, depth, age) +of …width, depth, age) +of …

① 倍倍倍倍倍倍 half, double, twice, times…half, double, twice, times… 倍倍+as++as+ 形容词形容词 +as +as ……

Answer the questions • 1.what is wrong with this sentence?• I went there two times.• 2.If object A is 10 metres long, and object B

is twice as long as object A ,how long is object B?

• 3. If object A weighs100kilogrammes, and object B is four times heavier,how heavy is object B?

twice

20 metres long

400 kilogrammes

Make sentences about the comparative Make sentences about the comparative sizes of the pairs. Use the words in the sizes of the pairs. Use the words in the

brackets .brackets .

1. Songhua River: 2309 kilometres

Yangtze River: 6300 kilometres ( long)

Example:Example:A: A: The Yangtze River is about three tiThe Yangtze River is about three times as long as the Songhua River.mes as long as the Songhua River.

B: B: The Yangtze River is about three tiThe Yangtze River is about three times longer than the Songhua River.mes longer than the Songhua River.

C: C: The Yangtze River is about three timeThe Yangtze River is about three times the length of the Songhua River.s the length of the Songhua River.

Winter in Harbin Winter in Beijing

-20℃ -5℃（（ cold/cold/coldnesscoldness ））A:A:Winter is four times as cold in Harbin as in Beijing.Winter is four times as cold in Harbin as in Beijing.

B: B: Winter is four times colder in Harbin than inWinter is four times colder in Harbin than in

Beijing.Beijing.

C: C: Winter in Harbin is four times the coldness of Winter in Harbin is four times the coldness of

winter in Beijing.winter in Beijing.

Mount Tai Mount Tai Mount QumolangmaMount Qumolangma1521m1521m 8848m8848m(high/height)(high/height)

A:A:Mount Qumolangma is about six times as high as Mount Qumolangma is about six times as high as Mount Tai.Mount Tai.B:B:Mount Qumolangma is about six times higher than Mount Qumolangma is about six times higher than Mount Tai.Mount Tai.C:C:Mount Qumolangma is about six times the height Mount Qumolangma is about six times the height of Mount Tai.of Mount Tai.

• 4) My house: 80 square metres, • My aunts’s: 160 square metres

• .

1 My aunt’s house is twice larger than my house.

2 My aunt’s house is twice as large as my house.

3 My aunt’s house is twice the size of my house.

5) Lily weighs: 45 kilograms

Tom weighs: over 90 kilograms

Tom weighs over twice as heavy as Lily.

Tom is over twice heavier than Lily

Tom is over twice the weight of Lily.

2. Some other structures 1) -er form + and + -er formOur city is becoming more and more prosperous with the development of industry.2) the + -er form, the + -er formThe higher the plane flies, the smaller it will look.

Look at the sentences.

• 1. It’s getting brighter and brighter.• 2. The closer you are, the more you’ll s

ee.• 3. The more books I read,the more• information I learn.

Answer the Answer the questions:questions:

A:Which of these structures is used to say that something is changing?

B: Which of these structures is used to say that things change/are changing together?

C:Which structures repeat the same adjectives/adverbs?

Sentence 1.2.3

Sentence 2.3

Sentence 1

1. The hot metal is getting bigger and bigger.2. The magnesium is getting hotter and hotter.3. The sun is getting stronger and stronger du

ring the morning.4. The sea is becoming warmer and warmer.

Use the words below to write sentences Example : temperature/get/lowThe temperature gets lower and lower

Pair work:Look at these sentences.Underline the comparative expressions and circle the adverbs used to give more information about the comparative expressions.

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.

a bit rather

a littlea lot

any(very) much

程度副词程度副词 <much, a little, a bit, a lo<much, a little, a bit, a lot, rather, no, any, (very )much…>+t, rather, no, any, (very )much…>+形容词或副词的比较级形容词或副词的比较级 ..