摘要:
该初中英语课件围绕“Greener Planet, Better Home”主题,聚焦re-前缀构词规律和现在完成时(for/since区别、延续性动词)。课堂导入通过教材例句引导学生观察归纳re-含义,再用填空练习巩固,过渡到语法聚焦,以语篇词汇为支架衔接现在完成时“线段法”讲解,形成词汇到语法的递进。
其亮点在于融合语言能力与思维品质,以环保主题为线索。导入“创意探秘”培养观察归纳能力,语法Practice结合对话、看图及开放问答,Production环节创编“双碳”环保口号渗透文化意识。知识树小结和中考真题练习助力学生系统掌握,教师可直接用于高效教学。
内容正文:
Unit 2
Greener Planet,
Better Home
主讲人:XXX
课型:语法探究课
Grammar in Use
学习目标
01
通过观察教材图片和原句,归纳前缀re-的构词规律,
能准确分析词汇构成。
(学习理解)
02
在教材对话语境中,探究现在完成时中for与since的区别,
掌握延续性动词的用法。
(应用实践)
03
结合中国“双碳”目标,分析环保行为的因果逻辑,
用所学语言汇报方案。
(迁移创新)
目标明确后,请大家翻开教材,开始探索第一关。
Contents
01
Lead in
05
Language points
02
Grammar Focus
06
Summary
03
Grammar Practice
07
Exercises
04
Grammar Production
08
Homework
现在进入第一节:Lead in,看看教材第一页藏着什么秘密。
01
Lead in
教材原题呈现
It's a good idea to reuse plastic bags as waste bags.
Scientists have found a new way to recycle waste paper
into new paper products.
Our community has renewed calls for cleaning up
the waste along the river.
创意探秘
请用2分钟找共同点,引出re-前缀含义,总结“re-”=again(再一次)。
① 观察纽带:这三个词 -- reuse, recycle, renewed -- 有什么共同之处?
② 追根溯源:它们都由“re-”加上一个动词组成。想一想,“re-”在这里可能表示什么?
③ 揭晓密码:“re-”的核心含义是 again(再一次),表示“再次做某事”。
(转场语) 既然找到了“re-”这个密码,我们赶紧去教材Activity 2 施法,创造新词!
【第6页】Lead in 内容页:教材P1 Activity 2
【教材原题呈现】
take → retake (重新拿取) /teɪk/ → /ˌriːˈteɪk/
write → rewrite (重写)/raɪt/ → /ˌriːˈraɪt/
visit → revisit (再次参观)/ˈvɪzɪt/ → /ˌriːˈvɪzɪt/
build → rebuild (重建) /bɪld/ → /ˌriːˈbɪld/
【填空练习】
We will the insect museum to learn more about ants.
Whenever there is pollution again, we need to action to stop it.
After the earthquake, people the city with the help from all over the world.
We can help world history by saving every drop of water.
请先自己填,限时1分钟,同桌互相核对。
(转场语):词汇密码破译完毕,现在进入语法聚焦!
revisit
retake
rebuilt
rewrite
02
Grammar Focus
第8页
Grammar Focus(教材 P1 Activity 3)
【教材语篇要点提取】
( recreate, reuse, reduce, rethink )
Many people use plastic bags… Perhaps, we should
about this…
One of the ways is to
them…
This is a great way to
the number of new plastic bags…
and
a greener world.
【语篇推演】
先自己尝试填出这4个空,2分钟时间,开始!
核对:第一空填 rethink(重新思考)。第二空,下文提示 “use it again”,填 reuse。
第三空,数量变少,填 reduce。第四空,重新创造绿色世界,填 recreate。
(转场语):这4个词连在一起就是环保的黄金逻辑链。如果要说“我坚持了很久”,
该怎么表达?翻开教材第二页!
第9页
【现在完成时精讲】
结构:have/has + 过去分词
含义:表示过去发生的动作对现在造成的影响,或从过去持续到现在的动作。
【for与since的语法本质(线段法)】
线段(长度):for + 一段时间(如:for five days)
for five days
过去
现在
将来
起点(点): since + 过去的时间点/一般过去时的句子(如:since 2020; since I listened)
since 2020 / since I listened
过去
现在
将来
请大家把定义和线段图记在笔记本上。
(转场语):了解了规则,我们马上进入操练巩固!
03
Grammar Practice
03 Grammar Practice 丨 教材对话探究 (Activity1)
Hi, Kangkang! Did you take
part in the speech about
waste sorting last Saturday?
Yes, I did. I have learned a lot
about waste sorting since I
listened to the speech.
Me too. I have kept sorting out
all the waste at home for five days.
Now I am really good at it.
【先留时间思考】
请大家用1分钟时间,自己默读这段对话,找一找哪些地方用了“一般过去时”,哪些地方用了“现在完成时”?
想一想为什么?
【细致讲解】
第一句(一般过去时):因为时间是“last Saturday”(上周六),这是一个明确的过去时间点,所以用“Did you take part…”。
第二句(现在完成时):“since I listened to the speech”中的“听演讲”是一个过去的起点,它影响到现在(学到了很多),
所以用“have learned”。
第三句(现在完成时):“for five days”表示持续了五天,这是一段时间(线段),所以用“have kept”。
核心口诀:since接起点,for接长度。
(转场语):这段对话完全印证了我们的口诀!接下来看教材第二页的表格,验证一下这个规律。
03 Grammar Practice 丨规律总结
【教材表格规律总结】:
结构 含义 例句(教材原句)
for + 一段时间 表示动作或状态
持续了一段时间 I’ve been on the project for
two weeks.
(two weeks)
since + 过去的时间点 表示动作或状态
从过去某一时间点
一直持续到现在 I’ve been on the project since
two weeks ago.
(two weeks ago)
①(转场语):现在请大家用这个表格的规律,自己独立完成教材Activity 2的三个填空,
限时1分钟。
03 Grammar Practice 丨 填空训练
1
We haven't seen any waste in the river several months.
(for)
How long has your city sorted waste?
2
2020.
(Since)
I have been in an environmental group the new term began. (since)
3
转场语:填空做得很好,现在挑战教材第二页Activity 3的看图说话,
请同桌讨论后回答!
[03] Grammar Practice
看图问答
1 How long has Li Wei kept sorting waste?
(3 years ago)
② How long has Lingling been
in the tree planting activity?
(one year)
同桌讨论30秒!严格要求:千万不能混用!不能填“for since three years”!
转场语
前面两题考的是别人,第三题考的是你自己!看看教材第三幅图。
[03] Grammar Practice 丨 开放问答
【教材原题呈现】
Have you ever recycled to protect our environment?
If so, how long have you been like this?
请用2分钟准备,用上“since”或“for”大声回答!
同桌采访。
(转场语):教材内容全部探索完毕,现在进入综合产出环节!
Grammar Production
04
04
Grammar Production 丨 句型创编
04
句型框架
Since China proposed the "double carbon" goal, we have reduced carbon emissions a lot.
(自从中国提出 "双碳" 目标以来,我们已经大幅减少了碳排放。)
同桌两人一组,用教材里的词汇和句型,创编一句属于
你们自己的环保口号,并派代表大声朗读!
转场语
句子造好了,我们要去抓一抓中考的高频考点,进入考点点拨!
05
Language points
05 Language points 丨 延续性动词
持续(延续)的状态
I've kept this book for three years.
三年前
现在
【知识点解析】:教材原句中的“kept”是延续性动词。
短暂性动词(如buy)必须换成延续性动词(如have)
才能与for/since连用!
【原创小题演练】:( ) I have
this dictionary for three years.
bought
borrowed
had
lent
请思考 10 秒。 答案选 C。
【转场语】:掌握了延续性动词,我们继续看for/since的完整变化公式!
05 Language points 丨 公式全解
知识点解析
原创小题演练
since + 过去时间点
自从……以来(某个过去的时间点)
例:Since 2010, he has studied in this school.
2
since + 时间段 + ago
She has kept the habit
(for / since) two years ago.
自从……以来(多久以前)
例:Since three years ago, she has lived here.
限时 10 秒
since + 过去时从句
3
自从……以来(从句用过去时)
答案: since
例:Since he left, I haven't seen him.
4
for + 一段时间
持续了……(一段时间)
例:He has lived here for five years.
公式掌握了,我们再深挖
"re-"前缀的深层拼写规则!
[05] Language points 丨构词法拓展
知识点解析:
当词根以“e”开头时,加re-前缀必须加连字符,如re-enter(重新进入)。
原创小题演练:
) Why is the hyphen (连字符) used in "re-enter"?
(
同桌讨论30秒
答案选B。
to make it longer
to avoid confusion in pronunciation
to make it new
(转场语):深层构词法掌握了,我们回到教材中最常见的高频短语辨析!
第22页
[05] Language points 丨 高频短语
词
take part in (参加活动)
keep doing sth. (一直做某事)
例
She often takes part in school activities.
她经常参加学校活动。
He has kept practicing the piano every day.
他一直每天练习钢琴。
【原创小题演练】
限时30秒
练
( C ) My father has
the army for five years.
joined
taken part in
been in
joined in
(转场语) 核心考点已经全部攻克! 现在进入课堂小结, 梳理知识树!
06
Summary
06 Summary 丨 知识树
本课知识树:
re-前缀
现在完成时
for+段
• since+点
• 延续性动词
take part in, keep doing
(转场语):知识梳理完毕,让我们用最新的中考题型来检验成果!
07 Exercises
07 Exercises 丨 中考单选
【真题实战】
How long…?
2024.
For
Since
In
At
(答案: B)
We should
plastic waste.
recreate
reuse
rethink
rerun
(答案: B)
题目做得不错,我们再做几道填空题巩固一下!
07 Exercises 丨 中考单选
【真题实战】
For
Since
In
At
(答案: B)
has worked
worked
works
is working
(答案: A)
题目做得不错,我们再做几道填空题巩固一下!
3. China has made great progress in cutting carbon emissions ____ it announced the "double carbon" goal.
4. China ____ hard to cut carbon emissions since it announced the "double carbon" goal.
07 Exercises 丨 填空综合
【课堂实战】:
1. We have
(success) recycled lots of waste paper. (successfully)
2. My father has kept
(sort) the waste. (sorting)
3. The city has
(rebuild) many parks. (rebuilt)
4. It has been three years
we planted the trees. (since)
(转场语):这类小题直接对应本课核心考点。今天的课接近尾声,来看看作业。
5. Our city has pushed for low-carbon transport 2021.
6. Many factories have reduced their carbon footprint several years.
successfully
sorting
rebuilt
since
since
for
08
Homework
08 Homework | 作业布置
【全做】
背诵教材第一页、第二页的原句和对话。
完成练习册语法专项单选和填空。
【选做】
用 “since” 和 “for” 各写一个句子,描述你坚持的环保活动。
【周末挑战】
采访父母或邻居,结合对话创编新对话。
小贴士
re- 密码
时间轴魔法
Greener Planet, Better Home!
带上“re-”密码和“时间轴”魔法,为地球发声!
Great job, Green People! Thanks for listening!
感谢观看
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