应该说成
I don't know where the home is .
I don't know 后面是句子,这个句子就是宾语从句,宾语从句如果含有特
殊疑问词,就必须操作成 特殊疑问词 + 陈述句的句序.例如 ：
I want to know what his name is.
I don't know how he got here.