english How much interest do they charge on loans?loan是可数的么 为什么charge on loans 用的是on啊

english How much interest do they charge on loans?
loan是可数的么 为什么charge on loans 用的是on啊

可数,收费用on

loan 是可数的。
chanrge既可以当及物动词，也可以是不及物动词。当不及物动词讲时介词一般用for，如charge for their service。这里的on 是interest on loans。