人教版九年级 Unit 6 When was it invented？知识点

Unit 6 When was it invented？

一．重点短语

1.by accident偶然;意外地     2.divide into把…分成…

3.take place发生     happen发生（没有被动形式）

4.all of a sudden=suddenly 突然;猛地

5.look up to 仰慕      6.dream of 梦想;梦见

7.translate…into…把…翻译成…

二．重点语法

1. 辨析invent; find; find out; discover

invent“发明”，指通过劳动运用聪明才智“发明/创造”出以前从未存在过的新事物

例：Who invented the telephone?

He invented a new teaching method．

find“找到、发现”，指找到或发现自己所需要的东西或丢失的东西，

着重指找到的结果。

例：We’ve found oil under the South Sea．

I finally found my English book. 

find out指经过研究或询问查明某事或真相。

例：I’ve found you out at last.

Please find out when the ship sails for New York.

Please find out what time the delegation will come.

discover“发现”，表示“偶然”或“经过努力”发现客观存在的事物、真理或错误，即指发现原来客观存在但不为人所知的事物，也可表示发现已为人所知的事物的新的性质或用途。      

Columbus discovered America in1492．

We soon discovered the truth． 我们很快就弄清了真相。

【练习】

a．Edison ＿＿＿＿ the electric lamp．

b．I lost my necklace last night．I haven’t ＿＿＿＿ it．

c．Who ＿＿＿＿ America first？

d．Can you ＿＿＿＿ what time the train leaves？

2.一般过去时的被动语态（见P188页）

  结构：was/were+过去分词

【练习】

(  ) 1. People’s Republic of China __ on October 1, 1949.

1. found   B. was founded    C. is founded    D. was found

(  ) 2. English ____ in Canada.      

1. speaks    B. are spoken    C. is speaking     D. is spoken

(  ) 3 This English song __   by the girls after class.

1. often sings  B. often sang  C.is often sang   D.is often sung

(  ) 4 This kind of car___ in Japan.   

1. A.makes     made     C. is making      D. is made

(  ) 5 Computers ___ all over the world.   

1. is used     B. are using     C. are used     D. have used