判断下列文章是否符合语法规则。


The cat was sitting on the mat, cleaning it's paws.
该句有一个语法错误。正确形式应该是 "cleaning its paws" 而不是 "cleaning it's paws"。"it's" 应该是 "it is" 的缩写形式，而 "its" 才是指 "belonging to it" 的形容词性物主代词。 

因此，正确的句子为： "The cat was sitting on the mat, cleaning its paws."