This hotel is far more luxurious than is necessary. This hotel is far more luxurious than it is necessary that it should be . 主句的比较项为far more …
在第一个例句中，You're older than I am, aren't you? “Than” 后面的从句是 “I am”，从句的主语为人称代词主格 “I”。在第二个例句中，She's much better at …
更多内容请点击：如何理解比较句型中的than is necessary - 柯帕斯英语网