the car is black(改成同义句)顺便解释一下什么叫同义句

the car is black(改成同义句)顺便解释一下什么叫同义句 The black car is my uncle‘s 改为同义句 The bag is black.的同义句 The pen is black 改为同义句 The car is quick 同义句 The car is expensive(改为同义句) the car is hers同义句 the car is his 同义句 Mr Black is an English teacher .（改成同义句） What.is.the.matter?改成同义句 英语:The bike is black.的同义句 mr black is from the uk. 改为同义句