1、1. 同义句转换就是把一个句子用另外一种结构表达出来，当然要保证句意不能改变。

2、2. My father goes to work by bike. 我爸骑自行车上班。

3、= My father goes to work on his bike.= My father goes to work on a bike.= My father takes a bike to work.= My father rides to work.