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save v.拯救 [seɪv] pine n.松树 [paɪn] discuss v.讨论 [dɪ'skʌs] branch n.树枝 [brɑːntʃ] root n.根 [ruːt] fight v.与...作斗争 [faɪt] against prep.反对 [ə'genst] example n.例子 [ɪg'zɑːmpl] harmful adj.有害的 [ˈhɑːmfʊl] gas n.气体 [ɡæs] produce v.产生，生产 [prə'djuːs] oxygen n.氧气 [ˈɒksɪdʒ(ə)n] major adj.主要的 [ˈmeɪdʒə] convenient adj.方便的 [kənˈviːnɪənt] furniture n.家具 [ˈfɜːnɪtʃə] imagine v.想像，设想 [ɪ'mædʒɪn] disease n.疾病 [dɪ'ziːz] dig v.挖 [dɪg] hole n.洞 [həʊl] carry v.搬，扛，背 ['kæri] container n.容器 [kənˈteɪnə] take in 吸收 come from 来自 for example 例如 [fɔː//ɪg'zɑːmpl] in fact （补充细节）确切地说 [ɪn'fækt] look around 环顾四周（be）made of 由...制成 millions of 大量的，数以百万计的
（be）good for 对...有用，有好处
Trees in our daily lives
我们日常生活中的树木
Rebecca wants to know more about trees and how they help us. She is interviewing Dr Jones about trees.
丽贝卡想知道更多关于树和树是如何帮助我们的知识。她在采访琼斯博士关于树的问题。
How do trees help us, Dr Jones?
琼斯博士，树是如何帮助我们的？
They help us in many ways. They keep the air cool and clean.
它们在很多方面帮助我们。它们保持空气清新。
They take in harmful gases from the air and produce oxygen for us to breathe.
它们从空气中吸收有害的气体并产生供我们呼吸的氧气。
They're major fighters against air pollution.
它们是对抗空气污染的主要战斗者。
I know trees also make our lives more convenient.
我知道树也使我们的生活更加便利。
Many of the things in our daily lives come from trees.
我们日常生活中的很多物品都来自于树。
For example, paper and pencils.
例如，纸和铅笔等。
You're right, Rebecca. In fact, we get a lot more from trees.
你说得对，丽贝卡。事实上，我们从树身上获得很多。
We get fruit and oil from them. Tea also comes from the leaves ot trees.
我们从它们身上得到水果和油。茶也来自树的叶子。
Look around this room. A lot of the furniture is made of wood.
环顾这个房间。很多家具都是用木头做的。
Trees are really important in our daily lives.
树对我们的日常生活来说非常重要。
I can't imagine a world without trees.
我无法想像没有树的世界。
But we cut down millions of trees every year.
但是我们每年都要砍伐几百万树木。
We should stop doing this if we don't want a world without trees.
如果我们不想拥有一个没有树的世界，我们就应该停止这样做。
More practice
The Amazon rainforest
亚马逊雨林
The Amazon rainforest in South America is the largest rainforest in the world.
美国南部的亚马逊雨林是世界上最大的雨林。
It covers five and a half million square kilometres of the Amazon Basin and spreads across nine countries.
它覆盖了亚马逊盆地五百五十万平方公里的面积，遍布九个国家。
The Amazon rainforest is very important because it is home to thousands of animals, birds and insects.
亚马逊雨林非常重要，因为它是成百上千万动物，鸟类和昆虫的家园。
However, people are destroying the area by cutting down many of the trees.
然而，人们正在通过大量砍伐树木来摧毁这片区域。
This is called "deforestation".
这叫做"森林砍伐"。
Many living things lose their homes because of deforestation.
很多生物因为森林砍伐失去了它们的家园。
As a result, the number of kinds of animals, birds, insects and trees in the world is decreasing.
结果，世界上各种动物，鸟类，昆虫和树木的数量在减少。
We must do our best to protect the Amazon rainforest.
我们必须尽我们最大努力来保护亚马逊雨林。
1.save vt. 拯救；解救
Eg. Let’s do something to save the animals in danger.
The police saved the child from the fire.
【拓展】save “节省、储蓄”
Eg. save money save time
【变形】safe adj. safety n.
2.discuss vt “讨论” 后接名词（短语）或wh-从句及wh-短语
discussion n.
Eg. We discussed the problem.
We will discuss who should do it.
We will discuss what to teach next term.
3.leaf n. “树叶”
复数：leaves
Eg. The fall of one leaf is enough to tell the coming of autumn. 一叶知秋。
The leaves turn green in spring. 变绿
4.help+do = help + to do “帮忙做……”
help+名词+（to） do
“帮（某人）做……”
Eg. I helped (to) wash the car.
I helped him (to) look for his key.
【拓展】help+with...或help+名词+with... “在某方面帮忙”
Eg.Can I help you with your work?
Can you help me with my homework, Mary?
5.fight for... “为……而战”
fight过去式：fought
fight against “与……作斗争”
Eg. He is fighting against his sickness.
They fight for freedom.
6.provide sb. with sth. = provide sth. for sb.
提供给某人……， 为某人提供……
Eg. Sheep provide us with wool. = Sheep provide wool for us.
7.in many ways “在许多方面”
【短语】 by the way 顺便说一下
in a way 在某种程度上
in the way of sb. 妨碍某人
on the way to...在去……的途中
in this way 用这种方法
8.keep “使维持（某种状态）”
keep+名词+形容词
Eg. The noise kept him awake.
keep+名词+副词/介词短语
Eg. Don’t keep the boy outside/ in the room.
keep +名词+doing
Eg. She kept me waiting for half an hour.
9.take in... “接受……， 吸收……”
Eg. The kind man would like to take in the poor boy.
Fish take in oxygen through their gills.
鱼用鳃吸氧气
10.breathe[i:] v. 呼吸
breath[e] n.
11.make 普通用词，指任何东西的制造或制造过程
Eg.He made the desk himself.
produce 正式用词，除表示大量生产制造外，还表示创造
Eg. The tree will produce some blossom next year.
12.in fact 实际上，事实上。用作状语，用于强调或订正前句。
Eg. He doesn’t mind. In fact he is pleased.
13.look around = look round “四下环顾” vt./vi.
Eg. Look around you before crossing the streets.
朝各方向看看
Don’t look around when you study.
学习时，别东张西。
现在进行时态
一、现在进行时的用法
1、表示说话时正在进行或发生的动作。如：
I’m babysitting my younger brother.
我在照看我弟弟。
It’s raining outside.
外面正在下雨。
2、表示现阶段一直在进行或不断重复的动作，但说话时该动作并不一定在进行。如：
He’s watching an interesting TV play these days.
近来，他在看一部很有趣的电视剧。
Are you teaching English in a school?
你在学校教英语吗？
3、表示最近的确定安排，即根据计划或安排在近期内将要发生的动作。这是表示眼前打算最普通的说法，但一般要与表示将来的时间连用，以避免现在进行时和一般将来时的含义上的混淆。例如：
I’m meeting you at the airport this evening.
今晚，我会到机场接你。
What are you having for dinner?
晚饭吃什么？
4、表示从一个地方到另一个地方位置移动的动词（如go, come, drive, fly, travel, arrive, leave, start, visit，run，return等），以及动词do等的现在进行时形式，可以用来表示没有确定安排的决定或计划。
He’s leaving for Beijing tomorrow.
他明天动身去北京。
What are you doing next Sunday?
下星期天你要干什么？
5、现在进行时和always，usually，all the time等连用时，表示一种经常、反复的动作，且说话人往往带有某种感情色彩（如赞扬、欣赏、厌烦、批评、惊讶、不理解等）。例如：
She’s always helping others.
她总是乐于助人。（表示赞赏）
You are always talking in class.
你上课老是说话。（表示批评）
二、现在进行时的谓语部分构成
现在进行时在句式的变化上，都应在助动词be上做文章。
1、 肯定式：be（am, is, are）+ Ving(现在分词) 如：
They are having an English class.
他们在上英语课。
2、 否定式：be(am, is, are) + not + Ving(现在分词) 如：
They aren’t having an English class.
他们不在上英语课。
3、 疑问式：将be的具体形式（即am, is或are）提前到句首。如：
Are they having an English class？
他们在上英语课吗？
助动词变化口诀：变疑问，往前提，句后问号莫丢弃；变否定，更容易，be后not 莫忘记。
三、现在分词的变化规则
1、 一般在词尾加-ing（一般-ing）。例如：going, playing, knowing
2、 以不发音的字母e结尾，先去e再加-ing（去哑e）。例如：making, arriving, coming
3、 以重读闭音节结尾，且词尾只有一个辅音字母时，先双写这个辅音字母，再加-ing（重闭单辅先双写）。例如：running, stopping, preferring
4、 以-ie结尾，先将-ie改成y，再加-ing。例如：tying, dying, lying
口诀：现在进行ing,以e 结尾要去e，除去几个特殊词，系住tie-tying死去die-dying要躺下lie-lying，直接ie变成y。
四、现在进行时态的常见提示语
1、在汉语中，通常有“在，正在”等提示词。如：
我在做作业。I am doing my homework.
2、在英语中，最常见的提示词有now, look, listen以及at the moment（此时此刻）等。如：
Look，they are playing football.
瞧！他们在踢足球。
五、运用现在进行时常见的几个错误
1、把动词变成现在分词形式易出错。例：
（1）误：They are swiming (swim) .
正：They are swimming (swim).
（2）误：Jenny is plaiing (play) football.
正：Jenny is playing (play) football.
解析：A、动词变现在分词可有如下口诀:一般-ing；哑e先去e；重闭单辅先双写；-ie结尾y来替。
B、动词现在分词的变化规则要与名词变复数、动词变现单三等规则区分开来。
2、谓语部分的构成不完整：丢掉be动词，或忘记把动词变成现在分词。例：
（1）误：Look! Two children flying (fly) a kite in the park.
正：Look！Two children are flying (fly) a kite in the park.
（2）误：Li Ming isn’t read ( not read) a book in bed now.
正：Li Ming isn’t reading ( not read) a book in bed now.
解析：现在进行时的谓语部分的构成是“be+现在分词”，二者缺一不可，这一点必须要牢记。
3、对动词或动词词组提问时，丢掉代动词doing。例：
The students are singing in the room.(对划线部分提问)
→误：What are the students in the room?
→正：What are the students doing in the room?
解析：现在进行时态中对动作提问可记住此句式“What +be +主语+doing+其它?”或简写为“What......doing......? ”句式。
4、现在进行时态的谓语部分是并列结构时，容易忽视第二个以及第二个以后的动词用现在分词形式。例：
孩子们在跑还是在跳？
误：Are the children running or jump?
正：Are the children running or jumping?
解析: or连接的是两个并列成分，动词形式须一致。
参考答案
一、
1. dig
2. gas
3. discuss
4. harmful
5. furniture
6. imagine
7. save
8. against
9. disease
10. hole
二、
11. come from
12. is looking around
12. In fact
14. is made of
15. doing their best
三、
16. branches
17. pollution
18. lives
19. saying
20. lying
四、
21-25 ADDBC
26-30 ACBDB
五、
31-35 BCADB
36-40 DBBDA
六、
41-45 CADBB
七、
The uses of trees
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