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(共32张PPT)
人教版八年级上册
SectionB
2a-2c
Unit 4 Amazing Plants and Animals
01
02
03
04
复习巩固阅读部分内容，梳理文章结构，能精准复述文本内容；
能够正确运用词汇的适当形式完成句子和语篇填空，理解词汇在语境中的具体含义；
借青蛙生态作用以及对蓝鲸的了解，树立保护野生动物增强生态保护意识。
掌握词汇分类、词缀（-ance/- (t)ion/-ness/-ity ）构词法，练习语境运用，构建词汇网络，提升自主探究与解决语言问题的能力；
Learning objectives
Let’s review about bees.
Warming-up
Bees are _____________ aimals, and their greatest work is ___________.
On one trip, they visit _______________.As they fly _____one flower ____ another, they take _______ with them. This action helps plants _______.
________their work, 80% of plants ___________can’t ______.For this reason,
Many scientists believe that animals are_________________animals on this planet. Bees are also one of _________________ aimals in the world.
They work hard together to ________________.In order to __________, they create __________.Another interesting thing about bees is how they ___________. When a bee finds ________, it uses a _______ to tell the others ______ and ____________ the food is.
hard-working
pollination
50 to100 flowers
pollen
grow
Without
in the world
grow
the most important
from to
the most interesting
make their homes
store honey
honeycombs
communicate
new food
dance
where
how far away
Revision
Let’s review the content.
情景设问：超市空架 → 引出主题
Fact 1: 蜜蜂授粉；
Fact 2: 蜜蜂趣事
现状危机＋号召行动
General Introduction (The topic of the text)
Body (The example and supporting details)
Para. 1
Para. 2
Para. 3
Para. 4
Conclusion (Problem and call to action)
Revision
Analyze the structure:
50 to 100 flowers
pollination
plants grow
hard-working
important
interesting
They work hard together to make their homes and create honeycombs to store honey.
They communicate with each other by dancing.
dropping
Revision
Draw the mind-map.
Retell the text according to the mind map
I can’t imagine our life without bees. Bees are ... Their greatest work is ... There are two interesting facts about bees ... However, ...
Revision
New drills
Pay attention to these words.
What do the words in the same group have in common
habit height size weight
joy happiness fun enjoy
angry disappointed smart sad
appear look seem watch
honey milk juice bread
nouns
positive feelings
adjectives
verbs
nouns
1. habit height size weight
2. joy happiness fun enjoy
3. angry disappointed smart sad
4. appear look seem watch
5. honey milk juice bread
Circle the odd ones. Then give your reasons.
2a
different
Tips: you should pay attention to the words’ part-of-speech,semantic category,grammatical function,substance category.（注意单词的词性、词义范畴、语法功能和物质类别）
What do ‘height, size, weight’ have in common ”
weight 重量
height 身高 / 高度
size 尺寸/大小
habit , height, size, weight
odd
Check the answers:
height（身高；高度 ）、size（大小；尺寸 ）、
weight（重量 ）都用于描 述事物的 “物理量化属性”。
What do ‘joy happiness fun’ have in common ”
Joy
happiness
fun
joy happiness fun enjoy
odd
Check the answers:
enjoy是动词，其他三个是名词表示积极情绪：“joy”
（欢乐 ）、“happiness”（幸福 ）、“fun”（乐趣 ）
What do ‘angry, sad, disappointed’ have in common ”
angry, sad, smart, disappointed
odd
Check the answers:
smart说的是个人聪明特质，其他三个是负面情绪形容词：angry”（生气的 ）、“disappointed”（失望的 ）、“sad”（难过的 ）
What do ‘appear, look, seem’ have in common ”
给人某种印象、传达一种主观判断或呈现出某种状态” 的含义
appear, look, seem, watch
odd
Check the answers:
watch是实际的观看动作，其他三个是表达表象 / 印象的: appear”（似乎）、“look”（看起来 ）、“seem”（好像；仿佛 ）
What do ‘honey, juice, milk’ have in common ”
honey, juice, milk, bread
odd
Check the answers:
bread”（面包 ）是 “固体食物” ，和前三个是液体饮品类
happiness
performance
reality
education
movement
decision
Do you know these nouns
Are they the original forms or changed ones
We can change verbs/adjectives into nouns by adding suffix.
We can add suffixes to their endings
[ s f ks] 后缀
happy (adj.) + -ness → happiness (n.)
perform (v.) → performance (n.)
educate (v.) → education (n.)
real (adj.) → reality
move(v.)-movement (n.)
decide(v.)-decision (n.)
1. act v. 行动;表演 → ___________________ n. 行动，行为
2. good adj. 好的 → ___________________ n. 善良，美德
3. kind adj. 友善的 → ___________________ n. 友善，仁慈
4. appear v. 出现;显得 → ___________________ n. 出现；外貌
5. real adj. 真实的 → ___________________ n. 现实
6. imagine v. 想象 → ___________________ n. 想象力
7. connect v. 关联;连接 → ___________________ n. 联系；连接
8. popular adj. 流行的,受欢迎的 → ________________ n. 普及,受欢迎度
9. communicate v. 交流,沟通 → ___________________ n. 交流,通信
10. important adj. 重要的 → ___________________ n. 重要性
connection
communication
action
kindness
reality
goodness
appearance
imagination
popularity
importance
Add the endings -ance, -(t) ion, -ness, and -ity to form nouns. Use your dictionary.
2b
1. -ance
规则：通常加在动词后面 ，构成抽象名词表示行为、状态、性质等 。
perform（v.表演；执行 ）→ performance（n.表演；表现 ）
assist（v.帮助 ）→ assistance（n.帮助；援助 ）
2. -(t)ion
规则：一般加在动词后，构成名词表示动作、过程或结果。
educate（v.教育 ）→ education（n.教育 ）
decide（v.决定 ）→decision（n.决定 ）
admit（v.承认；准许进入 ）→admission（n.承认；准许进入 ）
The rules for forming nouns with the suffixes -ance, -(t)ion, -ness, -ity:
3. -ness
规则：加在形容词后面 ，构成抽象名词用来表示形容词所描述的性质、状态。
happy（adj.幸福的；快乐的 ）→ happiness（n.幸福；快乐 ）
kind（adj.善良的 ）→ kindness（n.善良 ）
4. -ity
规则：常加在形容词后（部分词需对词尾做适当变化 ，如去掉不发音 -e 等），构成名词，表达与原形容词相关的性质、状态或情况。
active（adj.积极的 ）→activity（n.活动；活跃 ）
possible（adj.可能的 ） →possibility（n.可能性 ）
-ness
kindness
happiness
illness
-ment
development
amusement
management
-ce
convenience
silence
patience
-ion
pollution
suggestion
discussion
-ing
building
meaning
meeting
-t
complaint
weight
-ity
curiosity
diversity
表示事物 抽象名词居多
Summary
height
security
1. I felt ____________ when my favourite flowers died.
2. After the rain, some mushrooms ________ in the garden.
3. In my hometown, people often use bamboo baskets to ______ food.
4. What did you put in your luggage It _______ a ton.
5. I can’t ________ my life without my pets. They mean a lot to me.
appear disappoint imagine store weigh
disappointed
appear
store
weighs
imagine
形容词
动词原形
动词原形
动词原形
动词单三
Complete the sentences with the correct forms of the words in the box.
2c
mushroom / m r m /
n. 蘑菇；伞菌
ton /t n/ n. 吨
对……来说意义重大
The smallest ones are as tiny as a pea, and some big ones can be as large as your hand!
They can jump in the field.
They live in water or on land.
pea /pi / n. 豌豆
Guess what animal is it
Guessing game
It’s a frog.
the size of a pea
the size of a hand
Frogs play an important role in our ecosystem.
[ i k s st m] 生态系统
the smallest
the biggest
play a role (in) 在……中发挥作用；扮演角色
Let’s watch a video about frogs.
Video time
You may not realize it, but frogs play an important role in our ________ ecosystem. The smallest frogs are about the size of a pea, while larger ones can grow as big as a human hand. Many people know that frogs help to _______ farms by eating insects. _________, not everyone understands their __________ in nature. Frogs can live on _____ and in water. Because of this, they are popular subjects in studies on climate change and the ecosystem.
however important land planet protect
planet's
protect
However
importance
land
形容词
动词原形
副词
名词
名词
Complete the sentences with the correct forms of the words in the box.
2c
但是
重要的
陆地
行星地球
保护
live on land
生活在陆地上
live in water
生活在水里
because of + n./pron./doing
因为.....
play an important role in 在…中起重要作用
You may not realize it, but frogs play an important role in our
planet's ecosystem. (课本P38, 2d)
你可能没有意识到,但青蛙在我们星球的生态系统中起着重要作用。
① act/play the role of... 扮演……的角色
② play a role in... 在……中扮演角色/发挥作用
She acted/played the role of Lady Macbeth in the play.
她在剧中扮演麦克白夫人这一角色。
He was invited to play a role in this TV play.
他被邀请在这部电视剧里扮演一个角色。
Let’s learn and take notes:
The smallest frogs are about the size of a pea, while larger ones can grow as big as a human hand. (课本P38, 2d)最小的青蛙大约只有豌豆那么大，而较大的青蛙能长到人类手掌那么大。
Let’s learn and take notes:
这是一个并列复合句，由“while”连接两个分句，对比说明青蛙体型的两种极端情况，突出青蛙体型差异之大。
Some students prefer to study alone, while others like to work in groups.有些学生喜欢独自学习，而另一些学生则喜欢小组学习。
She likes to stay at home on weekends, while her brother enjoys going out to play sports. 她周末喜欢待在家里，而她弟弟则喜欢出去运动。
Complete the mind map about frogs.
protect farms by ___________
popular subjects of ___________
and the _____________
_________
Frogs
____________
____________
____________
_________
living places
sizes
eating insects
climate change
ecosystem
the size of a pea
as big as a human
hand
on land
in water
importance
What can frogs do for nature
Frogs help to protect farms by eating insects.
Frogs can help in studies on climate change and the ecosystem.
Frogs play an important role in the planet's ecosystem.
Homework
基础作业：整理名词后缀的知识点，并画成思维导图。
提升作业：模仿2d的段落结构，写一个关于另一种动物（如蜜蜂、蝴蝶等）的短段落，使用至少3个本课学到的词汇。
拓展作业：研究另一种在生态系统中起重要作用的动物，写一篇报告，包括它的特征、作用以及为什么需要保护它。
谢谢
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