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广州七年级英语下册 Unit 3（单词+课文+考点+练习）
Unit 3 Trees and us
branch/brɑ:nt /n.树枝
*root /ru:t/ n. 根；根茎
silent /'sa l nt/ adj. 不说话的；沉默的
overlook / v l k/ v. 忽略；未注意到
human /'hju m n/ n. 人
oxygen /' ks d n/ n. 氧；氧气
create /kri e t/ v. 创造
environment / n va r nm nt/ n. 自然环境
convenient /k n vi ni nt/ adj. 便利的；方便的
*furniture / f n t (r)/ n. （可移动的）家具
wood /w d/ n. 木；木头
treat /tri t/ v. 以…… 态度对待；以…… 方式对待
communicate /k mju n ke t/ v. 交流；沟通
*species /'spi i z/ n. 种；物种
product /'pr d kt/ n. 产品；制品
side /sa d/ n. 一面
borrow /'b r / v. 借；借用
dig /d ɡ/ v. 掘（地）；凿（洞）；挖（土）
hole /h l/ n. 洞；孔；坑
stick /st k/ n. 棍；条
accident /' ks d nt/ n. 意外；偶然的事
knowledge /'n l d / n. 知识；学问
character /'k r kt (r)/ n. 文字
spread /spred/ v. 传播
translation /tr ns'le n/ n. 译文；译本
take in 吸收；吸入
greenhouse gas 温室气体
to begin with 首先；第一点
come from 来自
look around 环视；环顾；四下察看
be made of 由…… 制成
for example 例如；譬如
communicate with 与…… 沟通
call on 号召；动员；要求
according to 据（…… 所说）；按（…… 所报道）
by accident 偶然；意外地
Our Silent Friends 沉默的朋友
From the deepest forests to our towns and cities, trees are all around
us.We share our world with trees. They are our silent friends, but we
often overlook them.In fact, trees are very important for all living things
on earth.
从最深处的森林到我们的城镇，树木无处不在。我们和树分享我们的世界。他们
是我们沉默的朋友，但我们经常忽视他们。事实上，树木对地球上的所有生物都
非常重要。
To begin with, forests are a safe place for animals, insects, and plants to
live.
首先，森林是动物、昆虫和植物生存的安全之地。
Trees are also good for us humans because they take in greenhouse
gases like carbon dioxide and produce oxygen.This means they help
create a clean environment for everyone on this planet.
树木对我们人类也有好处，因为它们吸收二氧化碳等温室气体并产生氧气。这意
味着它们有助于为地球上的每个人创造一个清洁的环境。
Trees make our lives more convenient.Many of the things around us,
such as paper and pencils, come from trees.Just look around your room.
A lot of the furniture is made of wood.
树木使我们的生活更方便。我们周围的许多东西，如纸和铅笔，都来自树木。看
看你的房间吧。许多家具是用木头做的。
Trees also provide us with delicious fruit and wonderful drinks.For
example, we can make tea from the leaves of the tea tree.
树木还为我们提供美味的水果和美妙的饮料。例如，我们可以用茶树的叶子泡茶。
Trees do so much for us. We can't imagine a world without
them.However, humans are not treating trees in a kind way. We are
cutting down forests all around the world.We are polluting the water
and the air, and this harms trees.All these things are a big problem.
树木为我们做了这么多。我们无法想象一个没有它们的世界。然而，人类并没有
善待树木。我们正在砍伐全世界的森林。我们正在污染水和空气，这伤害了树木。
所有这些都是一个大问题。
We need to do more to protect trees and save our planet.
我们需要做更多的事情来保护树木，拯救我们的星球。
考点汇总
【考点 1】What else do trees do for us？树木还对我们做什么呢？
【详解】else adv.另外；其他。通常用于复合不定代词或疑问词后。
例：I have something else to tell you.我还有别的事要告诉你。
Who else wants to have a try？还有谁想尝试一下呢？
【考点 2】We share our world with trees．我们与树木共享我们的世界。
【详解】share with 和......分享；共享
share sth.with sb....和某人分享某物
例：Some of them have to share with one another.
有些学生不得不和别的同学分享。
I＇d like to share my happiness with all of you.
我想和你们大家分享我的快乐
【考点 3】In fact，trees are very important for all living things on earth．
事实上，树木对地球上所有的生物都非常重要。
【详解】in fact 事实上＝actually
例：In fact，everyone can make it.事实上，每个人都能做到。
【拓展】辨析 living，live，alive 和 lively
（1）alive 意为“活的，活着的”，没有比较级和最高级，可用作表语和后
置定语，指人或动物，不能用来指植物。
例：The fish is still alive.这条鱼还活着。
（2）living 意为“活着的；现存的”，指人或物可用作表语和定语，作定语
时要在所修饰的名词前。还可作名词，意为“生存之道，生计”；make a livi
ng 谋生。
例：He is regarded as one of the best living writers at present.
他被认为是当代健在的最好的作家之一。
（3）live 意为“有生命的；活的；现场播出的”，可作定语，指动物或植
物，不能用来指人。
例：It wasn't a recorded show. It was live.它不是录制节目，是实况转播。
（4）lively 意为“有生气的；活泼的”，可用作定语、表语和宾语补足语，
指人或物。
例；Jenny is a lively girl.詹妮是个活泼的女孩。
【 考 点 4】 Trees are also good for us humans because they take in
greenhouse gases like carbon dioxide and produce oxygen.
树木对我们人类也有好处，因为它们会吸收二氧化碳等温室气体并产生氧气。
【详解】take in 此处意为“吸收；吸入”；take in 还有“欺骗”的意思。
【拓展】take 相关短语
take down 写下；拆除 take off 起飞；脱落
take away 带走 take up 占用
take over 接管 take out 切除；获得
take in 吸入 take back 收回
【考点 5】Trees make our lives more convenient．
树木使我们的生活更方便。
【详解】convenient adj：方便的；便利的
【派生词】conveniently adv.便利地；合宜地
convenience n.便利；方便；便利设施
inconvenient adj：不方便的；不便利的
【拓展】It is convenient to do sth....做某事很方便
例：It is convenient to take a bus at the bus stop.
在公交车站乘坐公交车非常的方便。
【拓展】make+宾语+adj.(宾补)
We＇ll do our best to make you happy.我们会尽一切努力使你幸福。
【考点 6】A lot of the furniture is made of wood．
很多家具都是用木头做成的。
【详解 1】furniture 是不可数名词。furniture 一般用来表示“设备，家具，
储藏物”，指室内的可移动的大件物品，是所有家具的总称。没有复数形式。
furniture 表示“量”，可用 much，little，a little，a lot of，lots of 等修
饰，但不能用 many，few，a few 等修饰。若要表示“数”，可用 a piece
of（article，item）of 等修饰。若要表示“一套家具”，可用 a suite of 修
饰。
We will buy some furniture for our new house。
我们得给我们的新房子买些家具。
This old table is a valuable piece of furniture.
这张旧桌子是一件很珍贵的家具。
【详解 2】be made of 由．．．制成（看得出原材料）
【拓展】辨析 be made of； be made from； be made into； be made
in；be made by be made of：短语意为“由......（材料）制成”，能看出原
材料。
如：The table is made of wood.这张桌子是木头做的。（看得出原材料）
be made from：短语意为“由......（材料）制成”，不能看出原材料。
如：Paper is made from wood.纸是木头做的。（看不出原材料）
be made into：其中介词 into 有“进入...；到...”之意，故短语意为“被制
成...”，后加“成品”，指某物被制作成另一物。
如：The fruit can be made into jam.这种水果可以制成果酱。
be made by：其中介词 by 有“被”之意，故短语意为“被...（某人）制作”，
后加“制造方”。
如：The table in the kitchen was made by a local craftsman.
厨房里的桌子是本地一位工匠制作的。
be made in：其中介词 in 有“在...”之意，故短语意为“被制作于...（某
地）”，后加“地点”。
如：My phone is made in China.我的电话是中国制造。
【详解 3】wood n．木材，木头（不可数名词）
【拓展】woods：n.森林 wooden：adj.木制的
【考点 7】For example， we can make tea from the leaves of
the tea tree．例如，我们可以用茶树的叶子来泡茶。
【详解】for example：例如；譬如。一般只举同类人或物中的一个为例，常用
作插入语，可缩写为 e.g.。
【拓展】辨析 for example 和 such as
for example 常以同类人或物中的“一个”为例，作插入语，用逗号隔开，
可置于句首、句中或句末。
such as 常列举同类人或物中的几个例子，不能列举全部。
I like fruits very much, such as apples, pears,grapes, strawberries,and so
on.我非常喜欢水果，例如苹果，雪梨，葡萄，草等。
For example，air is invisible.例如，空气是看不见的。
He，for example，is a good student.例如，他就是个好学生。
【考点 8】We can＇t imagine a world without them．
我们无法想象一个没有他们的世界。
【详解】imagine v.想象；设想
【派生词】imagination n.想象；想象力 imaginative adj：富有想象力的
【拓展】imagine 用法
①imaging（doing）sth.意为“想象（做）某事”。
It is difficult to imagine a world without books.
一个没有书的世界是很难想象的。
She imagined walking into the office and handing in her resignation.
她想象着自己走进办公室，递上辞呈。
②imagine＋从句：意为“想象...”。
You can＇t imagine what a great teacher she is！
你无法想象她是多么好的一位老师。
Just imagine （that） someone were following us.
想象一下要是有人在跟踪我们。
【考点 9】However， humans are not treating trees in a kind way．
然而，人类并没有善待树木。
【详解】treat v.对待，看待 in a kind way： 以一种友好的方式
【拓展】treat...as／like...：把......看作......
例：Don＇t treat me as／like a child.”（不要把我当作小孩子看待。）
treat 作动词还有“治疗；医治”的意思。
例：The doctor is treating his illness.（医生正在治疗他的病。）
treat 作动词还有“请客；款待”的意思。常见表达有“treat sb.to sth.”。
例：“He treated us to a big meal.”（他请我们吃了一顿大餐。）
【考点 10】We are cutting down forests all around the world．
我们正在砍伐世界各地的森林。
【详解】cut down 意为“砍伐；砍倒”。该短语是“动词＋副词”结构，
若宾语为代词，代词要放在中间，如 cut them down.
【拓展】cut 相关的动词短语
cut off 切除；剪下，切断（电，气） cut down 砍倒；削减
cut up 切碎 cut in 插嘴；干预
cut in line 插队 cut out 删掉；切除
【考点 11】call on people to stop cutting down trees．呼吁人们停止砍伐
树木
【详解】call on：动词短语，意为“号召；动员；要求”。
call on sb. to do sth.号召某人去做某事；另 call on＋sb.表示“拜访某人”。
【拓展 1】call 的相关短语
call back 回电话 call off 取消 call on／upon 号召；要求
call up 打电话给 make a call 打电话 answer a call 接电话
【拓展 2】stop 的用法
stop to do sth.停下来去做另一件事
stop doing sth.停止正在做的事
stop...（from）doing...阻止......做......
【考点 12】We can borrow books from the library or share books with fri
ends or classmates...
我们可以从图书馆借书，或者与朋友或同学分享书....
【详解】borrow v.借，借用；常用短语：borrow...from...从......借（入）
【拓展】辨析 borrow，lend 和 keep
borrow 表示“借入”
如：Can I borrow your umbrella？我能借用一下你的雨伞吗？
lend 表示“借出”
如：I have lent the car to my friend.我把车借给一位朋友了。
keep 表示“借，保存”，是延续性动词，可以和表示一段时间的状语连用
如：I have kept the book for two weeks.这本书我已经借了两周了。
【考点 13】According to a Chinese legend， Shen Nong discovered tea
by accident when some leaves fell from a tree into his drink.根据中国的
一个传说，神农偶然发现了茶，当时一些树叶从树上掉到他的饮料中。
【详解 1】According to：意为“根据”，为复合介词，后接名词或代词。注
意以下用法：
（1）主要用来表示“根据”某学说、某书刊、某文件、某人所说等或表示“按
照”某法律、某规定、某惯例、某情况等。如：
Everything went off according to plan.一切都按照计划实现了。
According to my watch it is five o＇clock．照我的表，现在是 5 点钟。
Each man will he paid according to bis ability 每个人将根据他的能力获得
报酬
（2）according to 表示“根据”，通常是指根据别人或别处，而不能根据自
己，所以其后不能接表示第一人称的代词（如 me，us），同时也很少接表示
第二人称的代词（you），但用于第三人称（如 him，her，Jim，Mary，the
doctor 等）则属正常用法。如：
误：According to me， the film is wonderful.
正：In my opinion，the film is wonderful.依我看，这部电影很不错。
（3）另外注意，according to 后也不接 view（看法）和 opinion（意见）这
类词表示看法的词。如：
误：According to my opinion， he did it very well.
正：In my opinion， he did it very well.在我看来，他干得很不错。
【详解 2】accident n．事故，意外；偶然
短语：by accident＝by chance 偶然地；意外地 traffic accidents 交通事故
【考点 14】Not long after Lu Yu died， tea culture quickly spread across
the country and he became known as the Sage of Tea.
陆羽死后不久，茶文化迅速传遍全国，他被称为“茶圣”。
【详解 1】spread v．传播→过去式 spread→过去分词 spread
spread across...遍布，遍及＝spread all over
【拓展】spread 做动词还有“开展；伸开”的意思。
如：The bird slowly spread its wings.这只鸟慢慢地张开了翅膀。
【详解 2】be／become known as=become famous as
被认为是；号称；作为...而出名
【拓展】be／become known for＝be／become famous for 因...而出名
be known to sb.为......所知
一、现在进行时
现在进行时表示正在进行的动作或存在的状态。现在进行时表示动作发生的时
间是“现在”，动作目前的状态是“正在进行中”。
二、句子结构：主语＋is／am／are＋doing（现在分词）
三、基本用法
用法 示例
现在（说话瞬间）正在进行或发 They are playing basketball now.
生的动作 现在，他们正在打篮球。
目前阶段正在进行，而此刻不一 We are making model planes these
定发生进行的动作 days.
这些天我们在做飞机模型。
英语中有四类动词一般不用进行时（不用现在进行时和过去进行时）
1．表心理状态、情感的动词，如 love， hate， like， want， believe，
prefer，know，realize，understand 等。
2．表存在、状态的动词，如appear，exist，lie，remain，stand，seem等
3．表感觉的动词，如 see，hear，feel，smell，sound，taste 等
4．表一时性的动词，如 accept，allow，admit，decide，end，refuse，
permit，promise 等。
四、时间状语
1.now,right now 2.at this/the moment
3.Look! Listen! Be quite! 4.these days, this week...
五、动词现在分词规则变化（直去双变）
情况 变形 示例
一般情况 加-ing work-working;listen-listening
以不发音字母 e 结尾 去 e，再加-ing write-writing;make-making
重读闭音节结尾的动双 写 词 尾 辅 音 字 母
词 加-ing run-running;put-putting
以 ie 结尾 变 ie 为 y 再加-ing lie-lying;die-dying;tie-tying
六、相关句型
肯定句式：主语＋be（am，is，are）＋现在分词＋其他。
They are having an English class.他们在上英语课。
否定句式：主语＋be （am，is，are)+not+现在分词+其他。
They aren’t having an English class.他们不在上英语课。
一般疑问句：Be（am，is，are）＋主语＋现在分词＋其他？
Are they having an English class？他们在上英语课吗？
特殊疑问句：疑问词＋be（am，is，are)+主语+现在分词+其他
What are you doing now？你现在在做什么？
【同步练习】
一、单项选择。
( )1.Is there _ I can do for you
A.else everything B.everything else
C.else anything D.anything else
( )2.Dr Smith shared his knowledge of smart technology the
students.
A.to B.from C.for D.with
( ) 3.Tim told his father he got an “A” in the math test,but
he didn't pass it.
A.at last B.in fact C.at least D.of course
( )4.Every thing needs air. Without it,nothing can keep .
A.living;living B.living;alive
C.alive;alive D.alive;living
( )5.The desk is in a mess. Would you please your books
A.take up B.take away C.take on D.take off
( )6.Nowadays, it's convenient and cheap for us a shared bic
ycle to go anywhere.
A.ride B.riding C.rode D.to ride
( )7.This is my bedroom.There some furniture and books on
the desk.
A.is B.are C.be D.has
( )8.We've just moved to this new house. I will show you around.
nice furniture it is!
A.What B.How C.What an D.What a
( )9.Lots of goods, computers and tablets, sell well this yea
r because of the trade-in（以旧换新）program.
A.such as B.for example C.because of D.in fact
( )10.She always talks to her colleagues a friendly way.
A.on B.in C.at D.with
( )11.To protect the environment, we should the use of plastic
bags.
A.cut off B.cut down C.cut in D.cut out
( ) 12.When I saw my friend on the street,I stopped to her.
A to talk R talking C talk D talked
( )13.---How many books can I from the school library at a t
ime
---Two.And you can -them for two weeks,but you can't them
to others.
A.borrow; lent; keep B.lend; keep; borrow
C.keep;lend;borrow D.borrow;keep;lend
( )14.Over a thousand years ago,silk began the world.
A.to be known for B.to be known to
C.to be known as D.to be known by
( ) 15.I think that Lingling a book now.
A.read B.reads C.is reading D.to read
( )16.---Why are you standing at the door
---I want to talk to Miss Wu,but she a meeting right now.
A.has B.is having C.had D.will have
( )17．We ＿ the drama The Age of Awakening（《觉醒年代》）
again now．Please join us.
A.watch B.are watching C.watched D.were watching
( ) 18.Don't disturb Sun Yang now.He for the swimming co
mpetition.
A.prepares B.prepared C.is preparing D.will prepare
( )19.Susie often _ computer games after dinner but now she
a book.
A.plays;is reading B.is playing;reads
C.plays;read D.is playing; is reading
二、写出下列动词的现在分词形式。
play make go like write
ski carry lie stop begin
buy dance get sing die
三、按要求完成句子
1．He is reading a book in the library．（对划线部分提问）
he a book
2．我正期待收到你的来信。
I hearing from you.
3．我正在寻找我的宠物猫。
I'm my pet cat.
4．在我们正在为期末考试做准备。
Now we are the final exam.
5．看！他们中的一些人正在海滩拍照。
Look! Some of them are at the beach.
6．---你哥哥正在做什么？---他正在给他的朋友发邮件。
your brother
---He emails to his friends.
7．I am reading a book in the library．（分别改为一般疑问句和否定句）
一般疑问句： a book in the library
否定句：I a book in the library.
8．They are playing basketball at the stadium．（对画线部分提问）
they basketball
9．The girls are playing games over there．（对画线部分提问）
the girls over there
10．She is cleaning the bedroom now．（变否定句）
She the bedroom now.
四、阅读理解。
My mum loves to feed birds. She puts a bird feeder（鸟食槽）in the
big tree in front of our house. Then, she waits for the birds to come. She
enjoys watching all the birds coming to cat there.
There was once a problem， though. Every year two squirrels（松鼠）
came and stole（偷）all the bird food. It really frustrated my mum. ＂W
hy do they think they can steal all the bird food ”She said. "If I wante
d to feed them, I would set up a squirrel feeder.”
Over the years, Mum has tried every way in the book to keep the s
quirrels away.But squirrels have a lot of talent. Mum once put up a fenc
e（栅栏）.But the squirrels just found a way to jump over it. It seemed
Mum wouldn't win.
Mum didn't give up easily, though. Two weeks ago, she went
on the Internet and read all about the problem with squirrels stealing fr
om bird feeders. She found a new way successfully. This weekend，Mu
m caught the two squirrels in a trap（捕捉器）.She drove
them outside of the city and let them go free.
Now, only birds come to Mum's bird feeder. She is happy. The birds
are happy.And of course, the two squirrels are happy living in the coun
tryside where there is always lots of food to eat. I think
everyone wins.
( )1.What does the underlined word "frustrated" in Paragraph 2 me
an in Chinese
A.使后悔 B.使欣喜 C.使懊恼 D.使得意
( )2.Mum found a useful way to keep the squirrels away .
A.last week B.last month C.in the book D.on the Internet
( )3.The squirrels Mum went to in the end.
A.a zoo B.a forest C.the city D.the countryside
( )4. Which is the best title for the passage
A.Who cares B.Who wins
C.How to feed birds D.How to live with squirrels
五、书面表达。
你们学校决定组织一次主题为“Planting Trees for the Earth”的植树活动。
假设你是班长，你要动员你班同学参加这次活动，请你写一篇不少于 80 词的英
文发言稿。要点：
（1）我国的森林覆盖率（coverage rate）低，近年来情况有所改善；
（2）树可以吸收有害气体，保持空气清新，防止水土流失；
（3）保护树木的建议（至少 2 点）。
Dear fellow students,
Forests are important to the environment.
一、1-5 DDBBB6-10 DAAAB11-15 BADBC16-19 BBCA
二、playing making going liking writing skiing carrying lying
stopping beginning buying dancing getting singing dying
三、、1.Where is ；reading2.am looking forward to3.looking for
4. preparing for5.taking photos6.What is；doing；is sending
7. Are you reading ；am not reading8.Where are；playing
9.What are；doing10.isn’t cleaning 四、1-4 CDDB
五、Dear fellow students,Forests are important to the environment. We s
hould plant more trees for the Earth.At present, the coverage
rate of forests in China is low, but the situation has improved in
recent years. Trees can take in harmful air and keep the air fresh.
Trees can prevent water and soil loss. To protect the Earth, people shoul
d take action as soon as possible.I have some advice. First,
people should plant more trees around the world. Second, people
should stop cutting down too many trees.Let’s try our best to
protect the Earth!
【详解】[总体分析]①题材：本文是一篇演讲稿；②时态：时态为一般现在时；
③提示：写作要点已给出，考生应注意不要遗漏，适当增加细节完整表述内容。
[写作步骤]第一步，介绍我国目前森林覆盖情况；第二步，介绍植树的好处；
第三部，提出保护树木的建议。[亮点词汇]①be important to对……是重要的②
at present 目前③cut down 砍伐[高分句型]①To protect the Earth, people s
hould take action as soon as possible.（动词不定式表示目的）

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