同义甜入艺阝句( 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，运用句法释义的手段可以来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.
