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7B Unit 5 Water
重点单词：
Drop n.滴 ，v.落下
Journey n.旅程
Quantity 数量
Quality质量
Experiment n.实验
Fresh adj.新鲜的
Salt 盐
Voice 声音
Add 增加
Chemical 化学制品
Through 穿过，通过
Pipe 管，烟斗
Valuable adj.宝贵的，很有用
Bit 少量
Bank 银行
Change 不可数n. 找给的
Return 归还，回到
Vapour 蒸汽
Form 形成
Stir 搅拌
Continue 继续
Crystal 水晶，结晶
reservoir
蓄水池
重点短语：
turn off 关闭
Turn into （使）变成
Add...to...把···加入
a bit 有点儿（要加上of才可以修饰不可数名词）
part of 部分
pocket money 零花钱
(be) made up of 由··组成
dry up干涸
重点句型：
1. Then it was time for sb. to ...到了做某事的时候了(page59)
2. Remember not to...
3. How much water is there...?
4. How much bottles of water are there...?
详细讲解：
1.Listen to a story about the journey of a coin.(page57)
journey
指从一个地方出发直达目的的长途旅行
He decided to make a journey to Guangzhou.
trip
指休闲或商业目的的短途旅行
He went on a business trip.
travel
无直达目的之意，指不同方向的旅行
He came home after years of foreign travel.
2. when you exercise,you need more water.(page58)
Exercise①为不及物动词，是“锻炼”的意思。
②可数名词：练习，体操
③不可数名词：锻炼，运动
3. two thirds.三分之二(page58)
英语中的分数表示：分子用基数词，分母用序数词。分子大于1时，分母要用复数形式。
拓展：四分之几一般用quarter表示，二分之一用half表示。
如：四分之一：a quarter 四分之三：three quarters
4. 倍数的表达分数：（page68）twice
（1） A+be+倍数+as+形容词原级+as B
如：my pens are three times as many as yours。我的笔是你的三倍
（2） A+be+倍数+形容词比较级+than B
如：my my pens are twice than yours。我的笔比你的多两倍
5. 表示every——“每隔···”的表达方法：
（1） every+基数词+复数名词：every four years每四年
（2） every+序数词+单数名词 every fourth year每隔三年
（3）每隔一··： every other +单数名词 every other line 每隔一行
6.辨析through、over、across
三者都有“穿过的”意思
①over是从物体表面上方经过，不与物体接触
例如：The bird flew over the river。鸟从河水表面飞过
②throngh是从物体中穿过，
例如：The elephant can't go through the gate.这头象不能从门里穿过。
③across从物体表面经过并且有接触
例如：The car is going across the brige 汽车正从桥上经过
7..So is this the end of your journey？那么这里是你旅程的终点吗？
end n.末尾，结局
At the end of
在···后期/末端
At the end of the street，you can see ahotel。
By the end of
到在···结束（表示时间概念）
He came back by the end of the meeting。
In the end
最后，终于 at last，finally。
In the end，we got to the small city。
8.We use how many how much to ask about quantities.
use “用” use sth to do sth.用某物做某事
人+be used to doing sth.某人习惯做某事
物+be used to do sth. 某物被用于做某事 如：wood is used to make paper。
9. Fix a dripping tap。修理滴水的水龙头。（page68）
（1） drip指水滴，只能用于液体。
Drop不管是做动词还是名词，都有滴下、落下的意思，可以使任何物体，不限于液体。
还有一个长得很像的伙伴：droop，指把脑袋低垂下来，一不小心丢了一个o，就把脑袋混丢了：He drooped his head in shyness. （害羞了把头低下了）
（2）
fix
=repair修道路，机器，以及日常生活
用品，如手表，自行车
My father is good at fixing broken watches。
mend
修补破损的东西，使其恢复原样，（包括用针线缝补），一般指较小的物品
Mum，can you help me mend my socks？
重点语法：如何谈论数量
我们可以用（not)much, many, a lot of, how much, how many等词来谈论数量，下面让我们一起来学习他们的用法。
一、 many, much与a lot of (lots of)
many, much与a lot of (lots of)三者意义相同，都有许多之意，many修饰可数名词复数形式；much修饰不可数名词；a lot of (lots of)既可以修饰可数名词复数形式；也可以修饰不可数名词。
There are many students in his school.
=There are a lot of /lots of students in his school.
I need much / a lot of time to check the answers.
二、 a few和a little
a few意为“几个”，a little意为“一点儿”a few修饰可数名词复数形式；a little修饰不可数名词. a few 和a little都表示肯定意义。
I need a few apples and a little green tea.
There are a few bananas and a little bread on the table.
注意：few 意为“很少”，little 意为“几乎没有”，few修饰可数名词复数形式；little修饰不可数名词. few 和little 均表示否定含义。
There is little water in the glass.
Few students take the taxi to school at Green High School.
三、 how many 和how much
两者都表示多少之意，都用于询问数量。how many 后接可数名词的复数形式，how much后接不可数名词。
How many students are there in yours class?
How much milk do you need?
注意：how much 还可以询问物品的价格。
How much is this sweater?
四、 too many 和too much
too many 和too much均为太多之意，too much修饰不可数名词，too many修饰可数名词复数形式。
There is too much smoke in the room.
There are too many rules in our school.
注意：much too用作副词，意为“太”，修饰形容词或副词。
Your room is much too dirty.
五、 too little, too few, not much, not many, no和enough
too little意为“太少”， 修饰不可数名词；too few意为“太少”，修饰可数名词复数形式；not much意为“几乎没有”修饰不可数名词；not many意为"没多少“修饰可数名词复数形式;no意为”没有“，修饰可数或不可数名词;enough意为"足够的"，修饰可数或不可数名词。
练习：
用所给单词的适当形式填空
1 Can these children look after ___________ when their parents are not at home. ( them )
2 Water is a ___________ resource, so we cannot waste it. ( value )
3 Trees can produce a ______________ to make their leaves taste nasty when insects want to eat them. ( chemistry )
4 We should never _____________ water because it is not easy for it to come to our flats. ( pollution )
5 About 3％of the water on Earth is without ____________( salty )
单项选择
1. Will you go for a walk after _________ dinner ?
a. a b. an c. the d. /
2. —Carl, why not go and help your sister water the flowers there ?
—Why ________ ? I’m busy myself. Jack is lying on the grass doing something.
a. me b. I c. him d. he
3. My cousin is always busy with his work, He has ________ time to read newspaper .
a. little b. few c. a little d. a few
4. There is ________ sugar in my coffee. It’s too sweet .
a. too much b. too many c. too few d. too little
5. Alice looked ______the room, but saw no one .
a. around b. for c. at d. up
6. Ben:What did Peter drop _________ the river ? Alice:Maybe a stone.
a. in b. into c. on d. onto
7. It’s time ________ all of us to get ready for the quiz.
a. to b. of c. for d. at
8. There ___________ twenty attendants at the contest tomorrow .
a. are b. have c. will have d. will be
9. We should __________ the used water clean before it goes back into the sea .
a. keep b. make c. become d. turn
10. After I had a bath in the bathroom this morning, I _______ the tap on, This makes the bathroom full of water.
a. left b. forgot c. turned d. switched
11. We all should remember ________ water.
a. to waste b. wasting c. not wasting d. not to waste
12. If you ________ some salt to a glass of water, it _______and become part of the water.
a. add...... Disappear b. add......will disappear c. will add.......disappear
d. will add....... Will disappear
13. When I was in Italy last year, I ________ a lot of famous cities .
a. visit b. visited c. visits d. am visiting
14. A reservoir is ______________ .
a. a place where people make clean water
b. a place where people keep river water to be used later
c. a place where people produce tap water for family use
d. a place where people make water dirty
15. ___________ is called the “Floating City” in the world .
a. New York b. Paris c. Kun Ming d. Venice
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