this is shoes with adjustable heels这句话语法正确吗

this is shoes 单复数冲突
These are shoes with adjustable heels.OK可以给我个问句和答句吗Are these shoes with adjustable heels?Yes, they are.这是什么？这是可调整后跟的鞋子？（这两句的翻译）What are these? Those are the shoes with adjustable heels. These 问，those答 shoes 前加定冠词，表示什么样的鞋子呢 是“后跟可以调整的”鞋子