《Inventions and Inventors》学案
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Unit 4 Inventions and Inventors学案
【本讲教育信息】
一. 教学内容:
Boonit 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。
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 International was written in 1871 by Eugene Potter, the French worker-poet.
3. 一般将ore schools will be built in my hometown.
He will be taken to hospital tomorrow.
4. 情态动词的被动语态
The meat should be kept in a fridge.
Rice can be boiled or steamed.
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