九年级英语|Unit 9 When was it invented?|Section A |学案

Unit 9 When was it invented
Section A(1a-4)学案
I学习目标
1学会单词invent heat 已以及be used for 的用法
了解下列单词的意思并能正确读出 calculator scoop adjustable heel operate battery slipper microwave oven light bulb
2正确运用被动语态谈论重要的发明的历史和用途
II重点呈现
1 When was / were …invented 4 What do you think is the most helpful invention
2 Who was / were … invented
3 What is /are … used for
III课前准备
1 Match the new words with their Chinese meaning
invent calculator scoop adjustable heel operate slipper heat battery- operate light bulb microwave oven
用勺舀, 可调整的` 后跟` 拖鞋 ` 电池供电的 使变热 发明创造 操作作业 微波炉
2 You should pay attention 过去时的被动语态的结构 was /were +p.p
你能从课本走找出例句吗？
3查找资料预习be used for的用法以及invent 的名称形式
IV 学习过程 任务一 看谁说的准
Edison invented the light bulb
The light bulb was invented by Edison
Karl Ben invented the car
_________ was invented by __________
Bill invented the telephone
__________ was invented by__________
任务二
1a Groupwork
任务三 1听录音完成1A 注意年代的读法
2 在听力的基础上完成对话
A The telephone ______ _______(invent)in 1876
B How about cars .i bet cars ______ _________(not invent)yet
A cars were invented in ____________ my family has a car
任务四 用1b中的内容进行对话
任务五 听2a 2b.在听之前先浏览听力要求
任务六 对话练习 A: What are they
B: They are battery –operated slippers
A :What are they used for
B They are used for changing the style of the shoes
A :What were they invented
B :They were invented by Julie Thompson
任务七3a 列出五项有用的发明和五项令人烦恼的发明
Helpful inventions Annoying inventions
______________________________ _________________________________
______________________________ _________________________________
_______________________________ _________________________________
________________________________ ___________________________________
_______________________________ _ ______________________________
任务八 小组讨论一下你们的观点并说出原因
A What do you think is the most helpful invention
BI think the most helpful invention is the light bulb.
A Why is that Well,
B it gives people more time to workand play every day.
任务九 Groupwork
Discuss your opinion about all of the inventions,what do you think is the most helpful invention Imagine that you are alone on a tiny island.choose five inventions you would like to have on the island with you .Tell the group of four what you chose and why.
V 拓展延伸、
The passive voice被动语态
英语中动词有主动语态和被动语态两种语态. 主动语态表示主语是动作的执行者,被动语态表示主语是动作的承受者, 在被动语态中动作的执行者有时用by短语表示来.
被动语态的构成
:助动词be+ (及物动词的) 过去分词
am (is, are) + done一般现在时
was (were) + done一般过去时
被动语态的用法:
1. 不知动作执行者时,常用被动语态.
eg. My bike was stolen yesterday.
This car is made in American.
2. 不必要说出动作执行者时,常用.
eg. Rome was not built in a day.
3. 为了突出强调动作的承受者时,常用被动语态.
eg. Thousands of beaches are polluted (污染)
主动语态变为被动语态的步骤
1.把原主动句中的宾语转换为被动语态的主语.
2.把动词改为被动形式,即 “be + 过去分词”注意be动词要按新的主语的人称和数进行变化,时态要和原来的主动语态的时态保持致.
3. 原来主动语态句中的主语,如果需要,就放在by后面以它的宾形式出现. 如果没有必要就可以省略.其他的成分 (定语,状语) 不变, 句式也不能变.
被动语态变被动语态的结构图:
Bell invented the telephone in 1876.
The telephone was invented by Bell in 1876.
VI 巩固与提升
一用适当形式填空
1He told us that the Jet plane_______ _______(invent) in1930
2 When ______ the Great Wall _______ (build)
3 Batteries are used for______(see) in the dark
4 Who______ they ________ (invent) by
二 按要求改写下列句子
1 The helicopter was invented in1990 （对划线部分提问）
_______ _________the helicopter ___________
2 Someone turned down the television just now （改为被动语态）
The television ________ _______ down just now
3 English is spoken as a second language in many countries（改为被动语态）
People ____ _____ as a second language in many countries
4 The glass is used for keeping water hot（改主动语态）
They _____ the glass_______ keeping water hot
5 I think the most helpful invention is the light bulb（对划线部分提问）
______ _______you think ______the most helpful invention
三 补全对话
A Hi,Anna What are you doing
B I am writing an e-mail to Victor on the computer.
A Great! It is very interesting.
B Yes I think the computer is ____ _____ helpful invention it can help people do many things
A Can it____ ______ ______ playing games
B Yes you can use the computer for playing many kinds of games
A Good It is useful I will buy one and learn how to use it
VII学习体会
同学们这节课你们学到了什么？还有什么不明白的地方？请写下来。