同义句( synonymic sentences) 亦称"同义异构句"。句法结构不同而命题意义相同的一组句子。如"老张批评了小王"、"老张把小王批评了"、"小王被老张批评了"，这三个句子就是同义句。
同义句之间可以互相转换而命题意义不变;如果转换前后命题意义不同，则不是同义句。同义句在语义学中也称释义句，歌冷摸吐披运用句法释义的手段可以来爷晃确立某些类型形式结构之间的转换关系。
句意分析
My father goes to work by bike. 我爸骑自行车上班。
= 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.
