Unit 9 When was it invented?

unit 9   when was it invented?
学习目标：
　　1．学会使用含有被动语态的不同句型结构“when/ where was it invented?” 和“what are they used for?--- they are used for doing sth..”来谈论各种发明物的历史。
　　2．学习理解被动语态的含义。能够就不同的发明物与他人交流看法，发表自己的见解，并陈述理由。
　　3．了解到更多在世界上有重大意义的发明，并向那些伟大的发明家学习。
　　　　一、日常用语
　　1. --- when was the car invented？
　　　 ---it was invented in 1985.
　　2. ---when were electric slippers invented？
　　 　---they were invented last year.
　　3. ---who were they invented by？
　　 　---they were invented by julie thompson.
　　4. ---what are they used for？
　　 　---they’re used for seeing in the dark.
　　
二．重点短语
　　１.. be used for 被用来做…
　　 　eg.
　　　 what is the book used for?　　　 　　书是用来做什么的？　　
　　 　the book is used for reading.　　 　 书是用来读的
　　 　the plane is used for traveling.　　 飞机是用来旅行的
２.be used to doing sth 习惯于做某事．
　　3. according to 根据，按照