在2010小四英文卷子有一题：
Crime has been increasing at an ( ) high rate in this neighbourhood.
1.alarm 2.alarmed 3.alarming 4.alarmingly
答案是4，alarmingly 小孩不理解这里为什么不用3.alarming?
在句酷上找到一句例句：This is now becoming an alarmingly common occurrence in the US.
不理解这里为什么用alarmingly 这个副词，请各位帮忙解答。谢谢
副词修饰形容词
谢谢，原来是这样！我再去语法书上好好专研一下，回头给小孩讲
用alarming修饰的是rate，没有用alarmingly修饰high更符合逻辑。