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Unit 4 Inventions and Inventors

unit 4 inventions and inventors

【本讲教育信息】
一. 教学内容:
book 15 unit 4 (i)
学会用动词的被动语态描述物体的使用方法,构成成份和功能作用。
 
二. 教学重点:
  1. 动词一般现在时被动语态。
  2. 动词一般过去时被动语态。
  3. 动词一般将来时被动语态。
  4. 情态动词的被动语态
  5. 重点词汇
 
三. 具体内容:
(一)被动语态是动词的一种特殊形式,表示句子中的主语是动词的承受者,也就是动作的对象。一般说来,只有需要动作对象的及物动词才有被动语态。
被动语态的用法:
1)当我们不知道谁是动作的执行者时,或者没有必要指出谁是动作的执行者时,
e.g. printing was introduced into europe from china.
a new bridge will be built here next year.
2)当我们关心动作的承受者但也关心动作的执行者时,用by加动作的执行者。
e.g. the town was destroyed by an earthquake.
英语动词的被动语态由助动词be+及物动词的过去分词构成。[来源:zxxk.com]
时态举例:
1. 一般现在时:
football is played all over the world.
english is spoken in britain, the us and some other countries.
roger, you are wanted on the phone.
2. 一般过去时:
the great hall of the people was built in 1959.
his leg was broken in an accident.
the intern

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