There is a (excite)____look on her face.

excited
worried
记住;ed修饰人,ing修饰物

an excited,不是a是an
worried

ed过去分词 表示 感到……
ing名次性形容词 表示 令人……
很好用 带进去就行
ls的片面

There is a exciting look on her face~~
there is a woorried/worrying look on her face~~(

worried

ed 表示主动
ing 表示被动