人教版九年级英语下册nit9Whenwasitinvented.SectionA课件25

1、人教九年级英语人教九年级英语 unit 9 when was it invented?section a (1a- 2d) do you know?what are the four great inventions in the ancient china?do you know when it was invented?who was it invented by?毕毕升升do you know when it was invented?who was it invented by? 1a look at the things below. in what order doyou thin

2、k they were invented? discuss them with your group. then number them 【1-4】(1= first, 4 = last). i think the tv was invented before the car. well, i think the tv was invented after the car. 语法重点一语法重点一 i think the tv was invented before the car. 我认为电视比汽车发明得早。我认为电视比汽车发明得早。 这是一个这是一个主从复合句主从复合句，think后面后面跟

3、了一个跟了一个宾语从宾语从句句。因为主句是。因为主句是一般现在时态一般现在时态，从句从句根据句意用了根据句意用了一一般过去时态般过去时态。（1）was invented意为意为“被发明被发明”，此结构为，此结构为一般过一般过去时的被动语态去时的被动语态。一般过去时的被动语态的结构为。一般过去时的被动语态的结构为“was/were + 及物动词的过去分词及物动词的过去分词”。如：如：these trees were planted last year. the car was bought yesterday. （2）invent做动词，意为做动词，意为“发明，创造发明，创造”，指发指发明以前没

4、有的新东西明以前没有的新东西。当。当物做主语物做主语时，常用时，常用被动被动语态语态。invention名词，意为名词，意为“发明物发明物”；inventor名词，意为名词，意为“发明家，发明者发明家，发明者”。如：如：edison, a great inventor, invented many great inventions during his life. many invention have been invented last year.1b. listen and match the inventions with the years._ 1876 _ 1885 _1927 _

5、19761c. student b, cover the dates. student a, ask student b when the things in the picture in 1b were invented. then change roles and practice again. when was the telephone invented? i think it was invented in 1876. 2a. listen and number the inventions 【1-3】in the order you hear them. _ shoes with

6、special heels _ shoes with lights _ hot ice-cream scoop,runs on electricity2b. listen again and complete the chart below.inventionwhat is it / are they used for?shoes with special heels_ the style of the shoesshoes with lightsseeing _hot ice-cream scoop_ really cold ice-cream2c. make conversations u

7、sing the information in 2b.what are they used for? theyre used for 语法重点二语法重点二what are they used for? 它们是用来做什么的？它们是用来做什么的？ be used for sth. /doing sth.意为意为“被用来做被用来做某事某事”，表示，表示用途用途或或目的目的，后接，后接名词名词或或动动名词名词，相当于，相当于be used to do sth。如：如：clothes are used for keeping (= to keep) warm. wood can be used for

8、building (= to build) houses. the stick is used to write on the blackboard.语法重点二语法重点二辨析：辨析：be used for ，be used as 与与be used by(2)be used as 被用作被用作 , as是介词是介词，意为意为“作为作为”，其后一般接，其后一般接名词名词，强调使用，强调使用的工具或手段。的工具或手段。 如如:the box is used as a table by my mother. (3)be used by 被被使用使用, by是介词是介词， 意为意为“被被,由由”，后接

9、动作的执行者。，后接动作的执行者。 如如: the tools are used by the workers in the factory.2d. role-play the conversation. hey roy, the subject for my school project is “small inventions that changed the world.” can you help me think of an invention? my pleasure! let me thinkhmm i know! the zipper!the zipper? is it rea

10、lly such a great invention? think about how often its used in our daily lives.you can see zippers on dresses, trousers, shoes, bagsalmost everywhere! well, you do seem have a point of course! i thought about it because i saw a website last week. the pioneers of different inventions were listed there

11、. for example, it mentioned that the zipper was invented by whitcomb judson in 1893. but at that time, it wasnt used widely. really? so when did it become popular? around 1917. 语法重点三语法重点三the pioneers of different inventions were listed there.不同的发明的先驱者都列在这里。不同的发明的先驱者都列在这里。pioneer 作作名词名词，意为，意为“先锋；开拓者；

12、先锋；开拓者；先驱先驱”。如：如：he was a pioneer in the use of x-rays. i see everybody as a pioneer out there. 作作动词动词，意为，意为“开辟；首倡开辟；首倡”。如：如：she pioneered the use of the drug. 小结训练小结训练1. the telephone _ by a well-known scientist ,edison. a. invented b. inventing c. was invented 2. english is used _ a second language _ people in many countries. a. as, by b. for ,by c. as, for 3. -what is the bottle used for ? -it is used