worry是动词或名词,worried是形容词
例句：worry做动词时：Do you worry about pollution?你担心污染的问题吗?
worry做名词时：You have no cause for worry.没有可担心的任何理由.
worried：I am not worried about your health but your marriage.我不是担心你的健康,我是担心你的婚姻.