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Unit13 We’re trying to save the earth
第三课时（教学设计）
教学目标 学习目标：
1.语言能力：在语境中理解、识记并运用本课时词汇：take part
in,afford,turn off,reusable,pay for,take action,transportation 等。
2.文化意识：能够用与污染相关的词汇，对环境污染和环境保护进行
简单描述。
3.思维品质：能运用目标语言谈论污染问题，能在实际情景对话中认
识解决空气污染和垃圾污染的方法。
4.学习能力：能正确区分和使用以下语法结构：现在进行时、used
to、被动语态、现在完成时、情态动词。
教学重点与难点 能正确区分和使用以下语法结构：现在进行时、used to、被动语态、
现在完成时、情态动词。并能在灵活的语境中运用本课学习的语法结
构。
教学准备 教具准备: ppt，教材，导学案
教学过程 老师活动 学生活动 设计意图
Lead-in 1. Greet the Ss 1.Greet the 创设情景，让学生在观
(4 minutes) 2. Show Ss a video and ask
teacher. 看视频和图片后思考问
them what’s happening to
2.Watch the 题，提升学生思考能
the earth.
video and 力。
3. Ask Ss what caused the
answer the
water pollution and how to
question.
solve it.
4. Think about
what caused
the water
pollution and
how to solve
it.
Present Ss some sentences Find out the 1. 小组合作找出语法
and ask them to find out grammar
重点，然后每组选择一
Presentation the grammar points in these points in the
(30minutes) sentences. sentences the 个语法点进行合作探
After that work in groups teacher gives.
究。
and talk about one point. After that
Group one work in 2. 小组合作锻炼学生1.The river used to be clean. groups and 的自主探究能力以及小
2.The river didn’t use to be talk about one
组协作能力。
point.
clean.
After
3.Did the river use to be
discussion,they
clean ?
4.Yes,it did./ No, it didn’t. need to share
their results.
1.肯定结构 used to do sth
2.否定结构didn’t use to do
sth /use not to do sth
3.一般疑问句Did ...use to
do sth ?/Used... to do sth ?
Yes,...did./No,...didn’t.
Practice
Group two
1. Some laws are developed
to stop the pollution.
2. These trees were cut down
by the workers last night.
3. In the future , more and
more work will be done by
the robots.
4.I think teenagers should be
allowed to choose their own
clothes.
被动语态构成 be+ 过去分词
一般现在时被动语态 am/is/
are+ 过去分词一 般 过 去 时 被 动 语 态 was/
were+过去分词
一般将来时被动语态will+be+过
去分词
有情态动词被动语态情态动词
+过去分词
Practice
Group three
1.Everyone should take part
in saving the earth.
2.He can’t play the guitar.
3.They may have finished the
task last month.
情态动词+动词原形
情态动词没有人称和数的变
化
常见的情态动词
can/could, may/might,
must/have to,should/ought
to, would,need 等。
Practice
DDAC
Group four
People are throwing rubbish
to the river.
Factories are putting waste
into the river.
1. 现在进行时的结构be（am,is,are)
2. 现在进行时含义
①表示正在发生或者进行的
动作。
②表示当前一段时间内的活
动或现阶段正在进行的动
作。
3. 标志性词now, right
now,Look! Listen !
Practice
CBB
Group five
1.现在完成时的结构have/
has+过去分词
2.现在完成时含义
①表示过去发生的事情对现
在造成的影响。
②表示从过去某一时间开始
一直持续到现在,并还有可
能继续下去的动作。
3.标志性词
already, yet, ever, never,
just, before,once, so far,
recently, for, since.Practice
6.B 7.D 8.B
1. Work on 4a and check Work on 4a 当场完成教材上练习，
the answers. and 4b .Then 检验课堂学习效果。
输出
check the 巩固语法的同时，也加
（ 7minutes
answers. 深对环境话题的输入。
）
After that,
work in
groups and
talk about
4c.After
discussion,show
their results to
2. Work on 4b and check their
the answers. classmates.
Work on 4c. Make a list of 合作讨论解决环保问题
things that people can do to
的方法和策略，培养学
help the environment and
生。
discuss your list with your
通过讨论环境保护巩固
partner.
Eg： 目标语言。
Turn off the lights when
you leave a room.Turn off the shower while
you are washing your hair.
Recycle books and paper.
Summary Summarize what they have Summarize 总结本堂课的语法知
(2 minutes) learned in this class. what they have 识，深层次加工所学语
learned in this 言，加深印象。
class.
Exercise Ask Ss to finish the Finsh the task 及时检测，及时掌握学
exercises on PPT. and check the 生学习情况。
(2 minutes)
answers.
Homework
1.Write 5 sentences with the language points.
2.Make up 5 exercises with the skills.
3.Search for information about environmental protection and endangered
animals.
板书设计
Unit 13 We’re trying to save the earth
Section A Grammar Focus
Used to do sth
被动语态
现在进行时
现在完成时
情态动词
