unit 9 when was it invented

人教版新目标英语九年级Unit 9《When was itinvented?》教学设计【关键词】英语教学设计一、教材分析（一）教材内容本课主要学习19世纪和20世纪10项发明（汽车、电视、电话、计算机……）的时间及用途。

语法项目是一般过去时的被动语态结构。

（二）教学特点本课教材的特点是语法项目和日常交际用语自然结合，内容形象直观。

通过操练when开头的特殊疑问句把学生引入话题（谈论重要发明的历史及用途）的语境中。

（三）教学目标1．知识目标通过本课学习学生能掌握10项发明的英语名称及由when引导被动语态一般过去时的特殊疑问句的结构及用法。

2．能力目标能运以下句型进行对话：When wasthe telephone invented?It was invented in 1876．What was it used for?It was used for talking to people in other places.培养学生的观察、分析能力，快速反应能力，自学能力和用英语交流的能力。

3．德育目标教育学生爱学习，爱科学，开阔学生的思路，培养学生的创造精神。

（四）教学重点和难点重点：口头掌握本课核心句型When was the telephone invented?It was invented in 1876．What was it used for？It was used for talking to people in other places.难点：when引导被动语态一般过去时的特殊疑问句的结构及用法。

二、学习分析苏霍姆林斯基认为：“教给学生方法比教给学生知识更重要。

”建构主义是近年来介绍到我国的一种新兴教育理论，它认为知识不是通过教师传授得到，而是学习者在一定的情境即社会文化背景下，借助学习过程中其他人（包括教师和学习伙伴）的帮助，利用必要的学习资料，通过意义建构的方式获得的。

基于这样的认识，结合本课内容和初三年级学生的特点及学习经历，在教学中我侧重指导学生采用以下三种学习方法：1．合作学习法。

各种时态的被动语态的构成：
1.一般现在时态 am, is, are +过去分词 2.一般过去时态 was, were +过去分词 3.一般将来时态 will (am/is/are going to) + be +过去分词 4.现在完成时态 have, has + been +过去分词 5.含情态动词的 情态动词 + be +过去分词
alarm clock
It’s an annoying invention. Because it wakes me up when I’m sleeping.
I think computer is the most helpful invention. Because it helps me search the information that I need.
把被动句变否定 Computers were not made in the USA.
4、They have grown rice in South China.
Rice has been grown in South China.
把被动句变疑问. Has rice been grown in South China？
Some inventors are creative,
They create many inventions.
Unit 9 When was it invented ?
Teaching goals:
I. Review what we learnt last class. II. Review and practice passive voice as well as we can. III. Check our homework.

Past tense was
catch
come do draw drink
caught
came did drew drank
are
begin break bring build buy can
were
begun broke brought built bought could
drive
eat fall
规则动词过去式的构成 构成规则 1、一般在动词原形末尾加– ed look play start live hope use stop plan trip 例词 looked played started lived hoped used stopped planned tripped studied carried
• Correct the following sentences.
• 1. From the magazine I learned there was no air or water on the moon. is
• 2. Did you see my pen? I looked for it for about an hour but didn’t find it. have been looking for
• 5. 一般过去式的句子构成。 • 肯定句: S+动词过去式+O+其他成分 如: Julie Thompson invented battery-operated sneakers. • 否定句: S+ didn’t /did not +动词原形+ O + 其他 成分 如: Shen Nong didn’t invent tea on purpose. • 一般疑问句: did +S + 动词原形+ O +其他成分 如: Did the chef invent potato chips by mistakes? 特殊疑问句：疑问词+did + S +动词原形+ O + 其 他成分 如：When did you graduate from this school?

A: What is the _______ telephone used for? B: I think it is used for talking with people _______________. （talk with people）
Pair work
What is/are the… used for? It’s/ They’re used for…
John
Who were the slippers invented by? The slippers were ____ invented _______ __ by Lily . When were the slippers invented? invented in The slippers were ___ ________ __ 1954 .
Who was the telephone invented by? ___ ________ __ Bell. The telephone was invented by
When was the telephone invented? The telephone was in 1978 . ___ invented _______ __
Who was the ... invented by? When was ... invented?
It was invented by... It was invented in...
Steve Jobs
2010
Karl •Benz 1885
Who was the TV invented by? invented ___ by Mark . The TV was ___ ________ When was the TV invented? was invented in 1927 . The TV ___ _______ __