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Unit 4 When was it invented

发布时间:2014-01-11 10:46:55  

Unit 4 When was it invented?
被动语态

将下列句子变成被动语态
1.I open the door.
The door is opened by me.

2.He often helps homeless people.
Homeless people are often helped by him.

3.I handed out some papers just now.

Some papers were handed out by me just now.

常用被动语态的短语
be made of 能看出原材料 由……制成的 from 看不出原材料 into 原材料被制成…… from wood. eg: Paper is made ____ of wood. Tables are made ____ into paper and tables. Wood is made _____ be used to do for doing 被用来…… as 被用作…… be filled with 被……填满 be covered with 被……覆盖


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