frightened和frightening的区别是用法不同。frightened是害怕的、受惊吓的意思，是指人的主观感受。frightening是令人害怕的，主要指物，是用在客观属性上的。
例句She was frightened that the glass would break.她担心玻璃会破碎。She was frightened that the plane would crash.她害怕飞机会坠毁。It\'s frightening to think it could happen again.想到此事可能再次发生就使人不寒而栗。
