资源简介

(共19张PPT)
Unit 4 Amazing Plants and Animals
第5课时
Section B (3a-3c)
R·八年级上册
Watch the video
What does this video talk about
The blue whale is the largest animal on earth.
What do you know about the blue whale
Read the text and complete the table.
3a
Blue whale facts Weight
Where they live
Food
How long they live
Importance in nature
The blue whale is the largest and heaviest animal on earth. It can weigh as much as 200 tons. Many people like watching blue whales swim, and they think it is one of the most beautiful things to see. Blue whales live in all oceans except the Arctic Ocean. They eat a lot, but they eat some of the tiniest animals in the ocean. A blue whale can eat around four tons of these a day.
Read and learn
在地球上
多达，达到……之多
n. 大海；海洋
prep. 除……之外；除了
adj. 极小的；微小的
Blue whales can live up to 90 years. When a blue whale dies at sea, it becomes food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a lively and healthy ecosystem. Blue whales play an important role in our world, so we must protect them.
Read and learn
live up to活到……岁；达到……的寿命
adj. 精力充沛的；生机勃勃的
扮演一个重要的角色
Blue whale facts Weight
Where they live
Food
How long they live
Importance in nature
as much as 200 tons
in all oceans except the Arctic Ocean
some of the tiniest animals in the ocean
up to 90 years
When a blue whale dies, it becomes food for many animals and it helps to create a lively and healthy ecosystem.
Check answers.
1. Blue whales can live up to 90 years. 蓝鲸的寿命可达 90 年 。
达到；符合（期望等）
live up to
活到（某一年龄、岁数等）
He always lives up to his parents’ expectations.
他总是不辜负父母的期望。
An elephant can live up to sixty years.
一头象能活到60岁。
Language points
拓展
同义词 reach
reach 达到（某一数量、程度、年龄等 ）；在表示活到某一年龄时，可与 “live up to” 替换。
Some trees can reach a height of 30 meters.
有些树能长到 30 米高 。
Some people can reach 90 years old.
有些人能活到 90 岁 。
2. Blue whales live in all oceans except the Arctic Ocean.
蓝鲸生活在除北冰洋以外的所有海洋中。
（连词）除了,只是；除非
（介词）除……之外；除了
The restaurant is open every day except Monday.这个饭店除了星期一每天都营业。
其后接名词、代词等作宾语，表示某人或某物不包含在某一范围内。
except
I won’t go except you come with me.
除非你跟我一起去，否则我不会去。
My dress is similar to yours, except mine is blue.我的连衣裙和你的相似，只是我的是蓝色的。
辨析
except, besides与but
except 除……之外；除了 强调所排除的内容不包含在内，含有“减去”的意思
besides 除……之外（还有） 包括 besides 后面的内容，含有“加上”的意思
but 除……之外 与 except 用法基本相同。常用于no, nothing, anything 之后
They all went to the party except Ann.除了安，他们都去了聚会。
We have a lot in common besides music.除了音乐，我们还有很多共同点。
There is no one but me.这里除了我没有别人。
Imagine you are a blue whale. Use the first person to rewrite the first paragraph.
3b
Hello everyone! My name is Billy the Blue Whale. I am __________
_______________________________________________________I’m heavy, but I __________________________________________
_______________________________________________________
I live in ________________________________________________
_________________________________ I can eat ______________ _______________________________________________.
the largest
and heaviest animal on earth. I weigh as much as 200 tons.
love swimming, and many people like watching me
swim. They think it’s one of the most beautiful things to see.
all oceans except the Arctic Ocean. My favourite food is
of these a day
some of the tiniest animals in the ocean.
around four tons
Complete your passage about the blue whale based on the text in 3a.
3c
写作指导
文本体裁
话题分析
要求完成段落的改写，主要改写内容为3a第二段的内容，涉及到蓝鲸的寿命和对生态环境的重要性等内容。
本文将第三人称的段落内容，改写为第一人称的段落内容。分析原文章属于介绍类文章，改写后，还是自身特性介绍，因此是说明文。
人称时态
以第一人称为主；以一般现在时为主。
What should we mainly pay attention to when rewriting an article
人称: 由第三人称变成第一人称
内容要点: 要点不能省略或者遗漏。
语言: 个别句子需要变化结构
weight
living area
food
preference（喜好）
Observe and think
How to use the first person to rewrite the second paragraph
points
lifespan
role /function
importance
Write your article according to the information mentioned above. Pay attention to your spelling and structure.
Be careful!
Checklist Self-evaluation Peer-evaluation Teacher-evaluation
Clear structure
Topic sentence
More relative information
Right linking words
Right grammar
Right spelling
Great Good Try harder Now, you can exchange your writings with your partner to check each other’s writing.
I can live up to 90 years. When I die at sea, I become food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a lively and healthy ecosystem. I play an important role in our world, so you must protect me.
For example
Finish and polish your composition for 3c and submit it in next class.
Complete the related exercises(完成本课时的相关练习).
Homework

展开更多......

收起↑