Unit 7 What's the highest mountain in the world第3课时考点讲解+writing（22张PPT）

Unit 7 What’s the highest mountain in the world?
R·八年级下册
第三课时
How much do you know about elephants and pandas?
Lead in
Elephant
is 350 cm tall
weighs 5,000 kilos
eats 150 kilos of food
a day
Try to describe the elephant using the information above.
For example:
1. This elephant is 350 cm tall.
2. It weighs 5,000 kilos.
3. It eats 150 kilos of food a day.
Panda
is 150 cm tall (standing
on two legs)
weighs 100 kilos
eats 10 kilos of food a
day
Try to describe the panda using the information above.
For example:
1. The panda is 150 cm tall when
it is standing on two legs.
2. It weighs 100 kilos.
3. It eats 10 kilos of food a day.
5,000 kilos
100 kilos
This elephant weighs many times more than this panda.
1. weigh意为“重量是……”时作连系动词；意为“称……的重量”时作及物动词。
你上次是什么时候称的体重?
When did you weigh yourself last time?
一、重量的表达
weight
gain/put on weight
增肥
lose weight
减肥
2. weight用作不可数名词的用法
英语中常用的倍数表达法有：
1. “A+谓语动词+倍数+形容词/副词的比
较级+than + B”表示“A比B……多少倍”。
He runs three times faster than his brother.
他跑得比他弟弟快三倍。
二、倍数的表达
2. “A+谓语动词+倍数+as+形容词/副词的原
级+as+B”表示“A是B的多少倍……”。
Our school is twice as big as yours.
我们的学校是你们学校的两倍大。
3. “A+谓语动词+倍数+the
height/weight/length …+of + B”
表示“A的高度/重量/长度……是B的多少倍”。
This hill is four times the height of that small one. 这座山的高度是那座小山的四倍。
1. At birth, a baby panda is about 0.1 to 0.2 kilos.
at birth“出生时”，相当于when it was born。birth为不可数名词，意为“出生；诞生”。
三、其他短语
2. A panda can live up to 20 to 30 years.
up to意为“到达（某数量、程度等）；至多有；不多于”。
be up to还可表示“（体力或智力上）能胜任；适合（做某事）；由……决定”，后可接名词或动名词作宾语。
He’s not up to the monitor.
他无法胜任班长的工作。
Why pandas are not common?
Because their babies often die from illnesses and do not live very long.
四、die from和die of
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die from
die of
通常指外部或间接的原
因造成的死亡。
通常指人体自身原因
（年老、忧伤）等造成
的死亡。
She died from a
traffic accident.
她死于一场交通
事故。
He died of illness.
他死于疾病。
What do you know about whales?
Let's write
whales
food
activities
appearance
living environment
birth
habits
Whales are sea animals. They live in the sea. They eat small fish and other sea animals. They can sing songs and sing very well. They are very interesting. One interesting fact is that some kinds have teeth.Another interesting fact is that they can jump high out of the water. But now some kinds of whales are in danger because there is more and more water pollution and people catch whales for meat, fat and oil.
The whales are in danger now.
What should we do to protect them?
Let's think
Our teacher tells us that the earth is about _______
as the moon.
A.as fifty time big B. fifty times as big
C.as big fifty times D. fifty as times big
Practice
Summary
1. This elephant weighs many times more than this panda.
2.Scientists say there are now fewer than 2,000 pandas living in the forests.
3.The babies often die from illnesses and do not live very long.
Thanks