excite形容词有两种形式，分别为：excited、exciting。
1、excited 感到兴奋的，主语是人；
例：I was excited about the possibility of playing football again.想到有可能再次踢足球，我很兴奋。
2、exciting 令人兴奋的，主语是物；
例：The race itself is very exciting.比赛本身就令人非常兴奋。
