Unit 9 When was it invented? Section A Period 1(山东省济南市)

课件18张PPT。Unit9 When was it invented ?Section A Lesson1Who is the man?He is Thomas Edison (1847—1931)More than 2000 inventions were invented by him, such as bulb(电灯）,gramophone（留声机）,movie with voice（有声电影）. He was called great king of inventions.calculatorWhen was it invented?When was it invented?When was it invented?When was it invented?When was it invented?12345A: I think the calculator was invented before the computer.
B: I think the calculator was invented after the computer.daceb___1876
___1885
___1927
___1971
___1976daecbauditionWhen was it invented?
Who was it invented by?
What is it used for?It was invented
in 1903.It was invented by the Wright brothers.It’s used for
travelling in the air.When was it invented?
Who was it invented by?
What is it used for?It was inventedin 1876.It was inventedby Edison.It’s used for keeping voice.gramophone(留声机)Microwave ovenWhat is it used for? It’s used for heating food.Mp3What is it used for?
It’s used for listening to musicWhat is it used for?
It’s used for talkingwithout meeting.Mobile phone
1.被动语态定义
被动语态表示主语是动作的承受者。如：The telephone was invented by Bell in 1876.2.被动语态的构成
被动语态由“助动词be+及物动词的过去分词“构成。助动词be有人称、数和时态的变化，其变化规则与be作为连系动词时完全一样。如：(1).It was invented in 1876. (2)They are used for listening to music.3.被动语态的用法
当我们不知道谁是动作的执行者或者没有必要指出谁是动作的执行者，或者只须强调动作的承受者时，要用被动语态，如：English is spoken in Canada.
Grammar:
The passive voice(被动语态） HOMEWORK:
Discuss with your classmates after class:
Which inventions would you have if you were alone on a desolate(荒凉的)island? Why?