(共47张PPT)
Unit 3
Trees and us
七年级
沪教版（2024）
下
核心知识梳理总结
梳理内容
01
单元单词梳理
05
单元语法梳理
02
单元词形变换
03
单元短语梳理
04
单元句型梳理
06
话题写作讲解
01
单元单词梳理
单元单词梳理
词汇 音标 词性和词义
branch /brɑ:nt / n.树枝
root /ru:t/ n.根；根茎
convenient /k n vi:ni nt/ adj.便利的；方便的
create /kri e t/ v.创造
environment / n va r nm nt/ n.自然环境
furniture / f :n t (r)/ n.（可移动的）家具
human / hju：m n/ n.人口
overlook / v l k/ v.忽略;未注意到
oxygen / ks d n/ n.氧;氧气
单元单词梳理
词汇 音标 词性和词义
silent /'sa l nt/ adj.不说话的；沉默的
treat /tri t/ v.以...态度（方式）对待
wood /w d/ n.木；木头
communicate /k mju:n ke t/ v.交流；沟通
species / spi i z/ n.种;物种
borrow /'b r / n.借;借用
product / pr d kt/ n.产品;制品
side /sa d/ n.一面
dig /d ɡ/ v.掘（地）；挖（洞）
单元单词梳理
词汇 音标 词性和词义
hole /h l/ n.洞；孔；坑
stick /st k/ n.棍;条
accident / ks d nt/ n.意外；偶然的事
character /'k r kt (r)/ n.文字
knowledge / n l d / n.知识;学问
spread /spred/ v.传播
translation /tr nz le n/ n.译文：译本
greenhouse gas 温室气体
take in 吸收;摄入
单元单词梳理
词汇 音标 词性和词义
be made of 由…制成
come from 来自
for example 例如;譬如
look around 环视;环顾;四下察看
to begin with 首先;第一点
communicate with 与......沟通
call on 号召;动员;要求
according to 据(…所说);按根据(...报道)
by accident 偶然;意外地
02
单元词形变换
单元词形变换
branch n . 树枝 → branches n . 树枝 (pl.)
root n . 根；根茎 → root v. 生根
convenient adj.便利的； 方便的→ convenience n. 便利→inconvenient adj. 不方便的
create v. 创造 → creator n. 创造者→ creation n. 创作→creative adj. 有创造力的→ creatively adv. 有创造力地
environment n. 自然环境 →environmental adj. 环境的
human n. 人→human adj. 人的；通人情的 →humans n. 人(pl.)
单元词形变换
silent adj. 沉默的；不说话的 → silence n. 沉默 →silently adv. 沉默地
treat v. 以...态度对待 → treatment n. 对待；治疗
wood n. 木头 → wooden adj. 木质的
communicate v. 交流；沟通 → communication n. 沟通；交流
product n. 产品；制品 → produce v. 生产；制造→ production n. 生产
dig v. 掘地；凿→ dug, dug 过去式； 过去分词
stick n. 棍；条 v. 粘贴；粘住→stuck，stuck 粘贴 过去式； 过去分词
单元词形变换
accident n. 意外；偶然的事 → accidental adj. 意外的→ accidentally adv. 意外地
character n. 文字 → character n. 特点；品质
knowledge n. 知识；学问 → knowledgeable adj. 知识渊博的
spread v. 传播 → spread; spread 过去式；过去分词
translation n. 译文；译本→ translate v. 翻译→ translator n. 翻译者
词汇练习
一、根据句意及首字母或汉语提示写单词完成句子。
1. A guide dog s________ a blind man's life yesterday.
2. It is c_________ for us to walk in the park at any time.
3. There is a lot of f ________ in the house, such as tables, chairs and beds.
4. Can you i_______ a world without trees
5.All the people went home________ ( 除 了) Mr. Wang, for he had to finish his work.
6.Look! The girl is putting a tree in a h________.
aved
onvenient
urniture
magine
except
ole
词汇练习
7.We should write on both _______ ( 面 ) of the paper.
8.—Lisa,could I _________ (借用)your computer
—Of course you can.Here you are.
9.The company sells its p_________ around the world.
10.The discovery was made by _________ (意外).
11.Kate felt excited to see a flock of sheep walking _________ (横过)the street.
sides
borrow
roducts
accident
across
词汇练习
12.The use of computers _________ (传 播) rapidly during that period.
13. _________ (多亏)my English teacher,my spoken English is better now.
spread
Thanks to
词汇练习
二、用括号中所给单词的正确形式填空。
1. It is ____________ (convenience) for people to live in a city.
2.The_______________(environment) problems will become more serious if we don't do anything about them.
3.We should____________(treatment) people around us in a caring and understanding way.
4.Jack is one of the most _______________ (knowledge) students in our class.
convenient
environmental
treat
knowledgeable
词汇练习
5.The terrible traffic _____________ (accidental) shocked us all.
6.The living room was full of __________ (wood) furniture.
7.In the past, people _______________ (communication) with each other by writing letters.
8.Emma ___________ (creative) a good impression on people because she smiles a lot.
accident
wooden
communicated
creates
03
单元短语梳理
单元短语梳理
1.吸收；摄入 take in
2.温室气体 greenhouse gas
3.首先；第一点 to begin with
4.来自 come from
5.环视；环顾；四下察看 look around
6.由……制成 be made of
7.例如；譬如 for example
单元短语梳理
8.事实上；实际上 in fact
9.产生氧气 produce oxygen
10.砍伐森林 cut down forests
11.伤害树木 harm trees
12.为……提供…… provide sb. with sth./ provide sth. for/ to sb.
13.与……沟通 communicate with
14.号召；动员；要求 call on
单元短语梳理
15.用……来做某事 use…to do
16.互相求助 ask each other for help
17.从……借 …… borrow... from ...
18.纸的双面 both sides of paper
19.森林友好型产品 forest-friendly products
20.据(……所说):按(……所报道) according to
21.偶然；意外地 by accident
单元短语梳理
22.迄今为止 so far
23.追溯到 date back to
24.泡茶的艺术 the art of making tea
25.传遍全国各地 spread across the country
26. 以……而闻名 be/become known as ...
04
单元句型梳理
单元句型梳理
1. From the deepest forests to our towns and cities, trees are all around us.
从最深的森林到我们的城镇和城市，树木无处不在。
2. We share our world with trees.
我们与树木共享这个世界。
3. She is kind to everyone and very patient with people.
她对每个人都很好，对人很有耐心。
4. They are our silent friends, but we often overlook them.
它们是我们的无声朋友，但我们常常忽视它们。
单元句型梳理
5. To begin with, forests are a safe place for animals, insects, and plants to live.
首先，森林是动物、昆虫和植物生活的安全场所。
6. Trees make our lives more convenient.
树木使我们的生活更加方便。
7. Just look around your room. A lot of the furniture is made of wood.
看看你的房间，很多家具都是木头做的。
8. Trees do so much for us. We can't imagine a world without them.
树木为我们做了很多。我们无法想象没有它们的世界。
单元句型梳理
9. However, humans are not treating trees in a kind way.
然而，人类并没有善待树木。
10. We are polluting the water and the air, and this harms trees.
我们污染了水和空气，这损害了树木。
11. 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和拯救我们的星球。
短语句子练习
一、根据汉语意思完成句子，每空一词。
1.没关系。我会找别人替他去。
It doesn't matter. I'll ask __________ ______to go instead of him.
2.人们砍了太多树来做课桌、椅子、筷子等。
People ____ _______too many trees to make desks,chairs,chopsticks and so on.
3.我们学校在洗手间为我们提供洗手液。
Our school _________ liquid soap(洗手液)for us in the washroom.
someone else
cut down
provides
短语句子练习
4. 我和莉莉决定明天早上在 校门口碰面。
Lily and I decided to ______ ____ at the school gate tomorrow morning.
5. 看 !他们在照料那棵树。他们在给它浇水。
Look!They are _______ _____ _____ the tree. They are watering it.
6 .国防教育为了保卫我们的祖国，我们应该共同 抗击敌人。
To safeguard our motherland,we should ______ ________ the enemies together.
meet up
taking care of
fight against
短语句子练习
7. 所有这些化石都可以追溯到1.83亿年前。
All of the fossils can ______ ______ _____183 million years ago.
8. 这本书在全球传播，因为它很有趣。
The book ________ _______ the world because it's really interesting.
9. 这款美味的果汁是由苹果、葡萄和橙子制 成的。
This delicious juice _______ _______ _______apples, grapes and oranges.
spreads across
date back to
is made from
05
单元语法梳理
单元语法梳理
现在进行时的语法要点
1、现在进行时的使用情况。
（1）表示现在(说话时)正在进行或发生的动作。
e.g. What are you reading now 你在读什么
Look! The bus is crossing the bridge.看！这辆公共汽车在过桥.
（2）表示当前一段时间内的活动或现阶段正在进行的动作。
e.g. I'm writing a novel at present.眼下我正在写一部小说.
They are working in a factory these days.他们这几天正在工厂劳动.
（3）有些动词,如come、go、leave、arrive、begin、start 等的现在进行时可表示将要发生的动作。
e.g. We are leaving on Saturday.我们星期六动身。
单元语法梳理
2. 现在分词的变化规则
变化规则 示例
大多数动词后直接加-ing do—doing sing—singing
以不发音的e结尾的动词,去e,再加-ing take—taking ride-riding
以重读闭音节结尾,且末尾只有一个辅音字母,先双写该辅音字母,再加-ing sit—sitting begin—beginning
以ie结尾的动词,变ie为y,再加-ing lie—lying tie-tying
以er结尾的动词,如果是重读音节结尾,先双写r,再加-ing;如果不是重读音节结尾,就直接加-ing prefer—preferring water—watering
单元语法梳理
3、现在进行时的句式结构。
肯 定 句 ：主语+is/am/are +doing+其它.
否 定 句 ：主语+is/am/are+not+doing+其它
一般疑问句：Is/Are/Am+主语+doing+其它
答语：Yes,主语+am/is/are./ No,主语+am not/isn't/aren't.
单元语法梳理
is am are
主语 第三人称单数 第一人称单数 第二人称及第一三人称复数
肯定式 She is watching TV. I am watching TV. You are watching TV.
否定式 She isn’t watching TV. I am not watching TV. You are not watching TV.
疑问式 Is she watching TV Are you watching TV Are you watching TV
简略回答 Yes,she is./No,she isn't. Yes,I am./No,I'm not. Yes,we are./No,we aren't.
单元语法梳理
4、现在进行时的常见时间状语
表示具体现在的时间状语 ：
now 现在，right now现在，at this moment/at the moment 此刻
e.g. She's cooking dinner right now.她现在正在做晚饭。
I'm studying now.我现在正在学习。
They are discussing the plan at this moment.他们此刻正在讨论计划。
动词作为提示词的时间状语 ： look 看，listen 听
e.g. Look! The children are playing football.看！孩子们正在踢足球。
Listen! The birds are singing.听！鸟儿们正在唱歌。
单元语法梳理
表示当前这个阶段的时间状语
these days 这些天 ，at present 目前，currently 目前
e.g. We're making model planes these days.这些天我们在做模型飞机。
单元语法梳理
5. 不能用于现在进行时的动词 1 、存在状态类动词 be, stay, remain 等
2 、表示“拥有，属于 ” have, own, belong to, possess, consist of 等
2 、心理状态和情感类动词 like, dislike, love; hate 等
3 、认知类动词 think, believe, want,mind,know,understand,wish,agree 等
3 、系动词类 seem, taste, turn, remain,appear,look,sound,feel 等
4 、瞬间动词类 accept, refuse, receive;decide;promise 等
语法练习
一 、单项选择。
1．It often ________ here in summer. It is ________ now.
A．rains; raining B．rain; rainy
C．rainy; raining D．rains; rains
2．Listen! Someone ________ in the room.
A．singing B．sing C．is singing
3．Look! Jenny ________ badminton with her teacher, Miss Wang.
A．playing B．play C．plays D．is playing
A
C
D
语法练习
4．The Smith family ________ Quanzhou on holiday tomorrow afternoon.
A．left for B．leave for C．are leaving for
5．—How time flies! Our junior high ________ to an end.
—I can’t forget the happy time we have spent together.
A．comes B．came C．was coming D．is coming
6．He is a great writer and he ________ a new book these years.
A．wrote B．is writing C．will write
C
D
B
语法练习
二、完成句子
1．They often play football in the playground.（用now改写句子）
They _____ ________football in the playground ______ .
2．Sally is watching TV now. (对划线部分提问)
_______ is Sally_______now
3．They are using crayons to color the card. (改为一般疑问句)
______they______ crayons to color the card
are playing now
What doing
Are using
/ /
06
话题写作讲解
话题写作讲解
请以“Tree Planting Day”为题，根据要点提示，写一篇英语短文描述一次植树活动并呼吁同学们保护树木。 要点提示：
1.简单介绍树木的作用；
2 . 描述同学们植树过程中的2-3个画面 (挖坑、挑水、栽树……);
3.呼吁同学们保护树木。
要求：80词左右；要点齐全、语言流畅、语句通顺。
Tree Planting Day
________________________________________________________________________________________________________________________________________
话题写作讲解
1. 体裁： 记叙文；
2. 人称： 以第一人称为主；
3. 时态： 以一般过去时和一般现在时为主。
4. 写作内容：开头点明在植树节组织环保团队在学校操场种树这一事件。
中间详细描述了种树的具体步骤，包括搬运树苗到空地、挖坑、放苗、系绳固定以及浇水等过程。接着强调树木对我们的重要性，如提供木材（用于制作各种物品）、有助于对抗污染等。最后呼吁身边的人一起保护树木。
写作思路点拨
话题写作讲解
开始：点题，交代植树节组织植树
中间：描述了种树的具体步骤，强调树木对我们的重要性
主题：植树节植树
最后：最后呼吁身边的人一起保护树木
We organized the environmental team to plant trees ....
As we all know, trees are important to us....Additionally, ...Trees also help...As a result, they ...First of all, we....Finally, we ...
It's hard to imagine a world without trees. So let's call on everyone around us to protect them！
文章结构
话题写作讲解
Tree Planting Day
We organized the environmental team to plant trees in our school playground on 12, March—Tree Planting Day.
As we all know, trees are important to us. We cannot live without trees because they provide us with wood. Additionally, many of the things in our daily life come
from trees, such as paper and pencils. A lot of furniture is made of wood as well. Trees also help fight against pollution. They take in harmful gases and produce oxygen.As a result, they keep the air cool and clean.
【范文赏读】
话题写作讲解
On Tree Planting Day, we planted trees together.First of all, we carried the saplings to empty land.Then, we dug some holes and put the saplings in them. After that, we tied strings to fasten the saplings. Finally, we watered them as carefully as we could.
It's hard to imagine a world without trees. So let's call on everyone around us to protect them！
Thanks!
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