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Doing being done
Having done having been done
Done

To do to be done
To be doing
To have done to have been done
Having finished his homework, he went to bed.
Finished, the homework was put aside.
The book being written by him is what I need.
The book written by him is what I need.

Unit 6
Text A

重點詞語
increasingly adv. 不斷增加地
Their argument became increasingly bitter.

prevalent a. 流行的，普通的
These diseases are more prevalent among young children.

frame n. 構架，框架
The bicycle frame was chained to a post, so the thieves could only steal the wheels.