now they have had special cages made to protect them from these monsters.请问made to 怎么理解,是词组,还是什么,和前面的have had是什么关系,

问题描述:

now they have had special cages made to protect them from these monsters.
请问made to 怎么理解,是词组,还是什么,和前面的have had是什么关系,

用于·~~前面的HAVE HAD是完成时·~他们已经有了....用来....

now they have had special cages which were made to protect them from these monsters.
省略which were