牛津深圳版英语七年级下册Unit 5《Water》（More Practice）ppt复习课件 （共26张PPT）

课件26张PPT。More PracticeMore Facts about WATER Task 2: Dictation
1. The singer sings beautifully because she has a beautiful v________.
2. Books are our friends. They are v________.
3. We can make the s______ seawater f_____ so that it can be drinkable.
4. The water in cities go t_______ the pipes under the streets.oicealuable reshhoughalt根据句意和所给的首字母填空。Dictationbit
bank
change
return
vapour
form
stir 有点；一点
银行
找给的零钱；找头
归还
蒸气；雾气
形成；构成
搅拌continue
crystal
a bit
part of
pocket money
(be) made up of
dry up 继续
结晶(体)
有点；一点
……的一部分
(父母给孩子的)零花钱
由……组成
干涸根据句子意思及首字母提示写出所缺的单词。
1. Playing chess is i______ , so I ’m interested
in it.
2. You can add some water to the soup
because it’s too s______.
3. Not all the water is c______ and safe to
drink.
4. We should not w______ every drop of water.astenterestingaltylean1. About ________ of the human body is water.
50% B. 30% C. 70%
2. About ________ of the Earth is water.
80% B. 75% C. 60%
3. Most of the water in the world is ________.
A. fresh water B. drinkable C. undrinkable
4. If water drips from the tap every 10 seconds, we will waste about ______ litres of water a year.
A. 215 B. 315 C. 415
5. Having a shower instead of a bath can save up to ______ litres of water a week.
A. 400 B. 300 C. 200More exercisehumandrinkablegroundwatertapshowerbathFacts about water Here are some interesting facts about water:
About 70% of the human body is water.
Oceans cover about 75% of the Earth, but
ocean water is salty. Therefore most of the
water in the world is not drinkable.
Groundwater may be drinkable, but it is
not easy to find groundwater that is clean
and safe to drink.Facts about water If water drips from your tap every 10
seconds, you will waste about 315 litres of
water a year—enough to fill two baths!
Having a bath uses about twice as much
water as taking a shower. Having a shower
instead of a bath can save up to 400 litres a
week.interesting facts
therefore
drinkable
have a bath
take a shower
twice as much…as
instead of
up to
It is not easy to find…有趣的事实
因此
可饮用的
泡澡
淋浴
是……的两倍
代替，而不是……
(数量，程度等)达到
找到……并不容易1. 他是那个小男孩的两倍高。
He is _____ as ____ as the little boy.
2. 我爸爸正在洗澡。
My Dad is ______ __ _______ at the moment.
3. 你替我参加宴会好吗？
Will you go to the party _______ ____ me? twice tall taking a showerinstead of ExercisesI.根据中文意思完成句子。4. 为我妈妈找一份礼物不是件容易的事。
___ ___ ____ _____ to find a gift for my
mother.
5. 这水经过处理?，但不是饮用水。
The water has been treated, but it is not
_________ _____ .
6. 他非常疲倦，所以没能做报告。
He was very tired, and _________ he didn't
give the report.drinkable waterthereforeIt is not easy 根据中文意思完成句子。
1. 我校学生的人数达到三千。
The number of the students in our school is
____ ____ three thousand.
2. 他喜欢喝果汁而不是牛奶。
He likes drinking juice ____ ____ milk.
3. 为了完成课题，他花的时间是我们的两倍。
He spent ____ ____ ____ time ____ us to finish the project.
4. 科学家要发现新的能源不容易。
____ not easy ____ the scientists ____ ____
new energy.It’s for to findup toinstead oftwice as much asWhat do the numbers about water tell us?Group discussionB In groups, discuss what else we can do
to save water. Turn off the tap when you are not using it.
Use fewer chemicals in daily life.
Take a shower instead of a bath.
Clean the floor with used water.
Collect rainwater to water plants or wash cars.
…Can you think of more ways to save water?Saving water at home bathroom
kitchen
laundry roomIn the bathroom* Install low-flow shower heads.
* Take shorter showers.
* If you take a bath, fill the
bathtub less than halfway.
* Turn the tap off when you are
brushing your teeth and
washing your hands.
* Install a highly efficient flush
toilet.
…In the kitchen* Wash vegetables in a
container, not under running
water.
* Use the dishwasher for full
loads only.
…In the laundry room* Use the washing machine for
full loads only.
* …Language PointsTherefore most of the water in the world is not
drinkable. 因此，世界上大部分的水是不能喝的。
therefore 意为“因此；所以”，与so 同义。注意其区别：
therefore 是副词，不能直接用来连接两个简单句，常放
在句首，后面可以加逗号；放在句中作为插入语时，其
前后都要加逗号。so 是连词，可以连接两个简单句，后
面不加逗号，常用于口语中。请比较：
她很友善，因此我们都喜欢她。
She is kind. Therefore, we all like her.
= She is kind, so we all like her.
因此，结果将会很不一样。
The result can, therefore, be very different. 选用therefore或so填空。
1. Alice studies hard. ______ she does well in her studies.
2. He drank too much tea last night. ______, he couldn’t sleep well.
3. He is ill, ______ he can’t go with us.soThereforeThereforeHaving a bath uses about twice as much water as taking a
shower.泡澡所用的水大约是淋浴的两倍。
?twice 在本句中意为“两倍”，另外，它也有“两次”之意。英
语中，“倍数”和“次数”的表达是一样的。once 意为“一次；
一倍”，twice 意为“两次；两倍”，“三次”或“三倍”以上则用
“数词+ times”来表达，如：four times意为“四次；四倍”。
?倍数用在比较等级的句型时的用法：A + be +倍数+ as +形容词原形+ as +B 意为“A 是B 的……倍”；
A+ be+倍数+形容词比较级（bigger ...）+than + B意为
“A比B（大……）……倍”。如：
他们的教室是我们的两倍大。
Their classroom is twice as big as ours.
这栋大楼比那栋高两倍。
This building is twice higher than that one. 根据中文意思完成句子。
1. 她的书是我的三倍。
She has ____ ____ ____ many books ____ I
have.
2. 在春节时，他花的钱是平时的两倍。
At the Spring Festival, he spends ____ ____
much money ____ usual.
3. 他的房子比我的房子大两倍。
His house is ____ ____ ____ mine.twice bigger thanthree times as as twice as
as