初中英语人教版（2024）九年级上册（2024）Unit 5 Power of IdeasSection A3a-3d课堂教学课件ppt

这是一份初中英语人教版（2024）九年级上册（2024）Unit 5 Power of IdeasSection A3a-3d课堂教学课件ppt，共22页。PPT课件主要包含了Lead-in，drone，smartphone，New words，Textbook，the radio，In ，Show Time， 翻译句子等内容，欢迎下载使用。
Sectin A（3a-3d）
· 学习目标· 新课导入· 内容讲解· 课堂总结
Learning gals
1. New wrds: invent2. Sentences: ① Suddenly, news culd be spread arund the wrld in secnds. ② In 1901, a radi message was sent acrss the Atlantic Ocean fr the first time. ③ It als had a big effect n music.
the greatest inventins f the 21st century
electric car
invent /ɪnˈvent/ v. 发明；编造
Read the cnversatin. What des Peter think is the mst useful inventin f all time?
Fu Xing: What d yu think is the mst useful inventin f all time, Peter?Peter: It has t be the radi.Fu Xing: The radi? Why?Peter: Befre the radi was invented, infrmatin travelled very slwly. The wrld was made much smaller by the radi. Suddenly, news culd be spread arund the wrld in secnds.
Fu Xing: Right. Wh was the inventr?Peter: An Italian inventr called Guglielm Marcni. He develped the idea in the 1890s. In 1901, a radi message was sent acrss the Atlantic Ocean fr the first time.Fu Xing: Ww! That was quite a distance at that time.
Peter: Yeah. And because f the radi, sme ther imprtant inventins were develped as well.Fu Xing: Like the televisin?Peter: That’s right. It als had a big effect n music. The radi made it much easier fr peple t enjy music frm artists arund the wrld.
Read again and cmplete the chart.
Inventin:___________
Wh was the inventr?___________________
Guglielm Marcni
When was it invented?___________________
Hw did it change the wrld?
The wrld was made much smaller by the radi. News culd be spread arund the wrld in secnds.
Because f the radi, sme ther imprtant inventins were develped as well.
The radi made it much easier fr peple t enjy music frm artists arund the wrld.
•________________________________________________________________
•__________________________________ ___________________
•_____________________________________________________________________
Listen t the cnversatin. Pay attentin t hw the key infrmatin is stressed. Then rle-play the cnversatin.
Language pints
1. “ f all time ”意为“有史以来、所有时代中”,用来强调范围，表 示“在所有时间/所有事物里最……”。 例句：This is the mst useful inventin f all time. （这是有史以来最有用的发明。）
2. 关键搭配：它必须和形容词/副词的最高级一起使用，用来修饰 名词，放在名词后面。 常见结构有两种： • the + 形容词最高级 + 名词 + f all time • ne f the + 形容词最高级 + 复数名词 + f all time
1. This is ______ inventin f all time. A. useful B. mre useful C. the mst useful D. mst useful
屠呦呦是有史以来最伟大的科学家之一。Tu Yuyu is ne f the greatest scientists f all time.
Chse anther inventin that yu think is the mst imprtant and make a mind map abut it. Then describe it t a partner.
I think the mst imprtant inventin f all time is the Internet. It des nt have a single inventr, but scientists like Vint Cerf and Bb Kahn helped develp its cre technlgy in the late 1960s, and it became widely used by the public in the 1990s. The Internet has changed the wrld in many ways. First, it lets infrmatin travel arund the wrld in secnds, s peple can get news and knwledge much faster than befre. Secnd, it made it pssible fr ther great inventins like smartphnes and nline shpping t develp. Finally, it has changed hw we wrk, study, and cmmunicate with thers, making the wrld feel much smaller and mre cnnected.
1. “ in secnds ” 意为立刻、马上、几秒钟之内，不是“在若干秒 里”，侧重速度很快、瞬间完成。
2. 句子成分：常在句中作时间状语，多放句末，也可放句首表强调。 句式结构：主语 + 谓语 + 宾语 + in secnds 例：Yu can lk up any infrmatin in secnds. 你可以瞬间查到任何信息。
3. in secnds vs in a secnd• in secnds 复数：几秒内、顷刻间（泛指速度快，日常通用）• in a secnd 单数：马上、片刻之后（侧重立刻马上，偏口语）4. in secnds vs fr secnds• in secnds：表示完成时间，动作在几秒内做完• fr secnds：表示持续时长，动作持续了好几秒
1. The clever by wrked ut the difficult math prblem ______. A. in secnd B. fr secnd C. in secnds D. fr secnds
With the Internet, we can get news in secnds.有了互联网，我们几秒钟内就能获取新闻。
“ have a big effect n… ”1. 含义：对……有很大的影响
2. 变体拓展（写作提分必记）have a great effect n 有巨大影响have a strng effect n 有强烈影响have a bad effect n 对……有不良影响have a gd effect n 对……有好的影响have n effect n 对……毫无影响
3. 易混词辨析 effect vs affect • effect：名词,意为影响、效果 搭配：have an effect n • affect：动词，意为影响 句式：sth. affects sb./sth. 例句：The Internet has a big effect n ur life. = The Internet affects ur life greatly. 互联网对我们的生活影响很大。
1. Weather has a big effect ______ ur md. A. in B. n C. at D. fr
网络对我们的学习有很大的影响。The Internet has a big effect n ur study.