Ⅰ. exciting 与excited 都含有“激动”的意思，在句中可作定语或表语。
exciting 指某事物“令人兴奋、激动”，主语常是物。如：
① Skiing is more exditing than skating. 滑雪比滑冰更令人兴奋。
② It was an exciting match. 那是一场激动人心的比赛。
Ⅱ. excited 表示某人对某事物“感到兴奋、激动”，主语常是人。如：
① The boys were excited when they saw their team was winning 男孩们看到自己的球队要赢了，都十分激动。
② The excited children were opening their Christmas presents.兴奋的孩子们正在打开各自的圣诞礼物。
英语中与它有类似用法的词常见的还有：
interested 感兴趣的 interesting 令人感兴趣的
worried 感到着急的 worrying 令人着急的
tired 感到疲倦 tiring 令人疲倦的
bored 觉得厌烦的 boring 令人厌烦的
frightened 感到害怕的 frightening 令人害怕的