如果该动词与逻辑主语或者所修饰的词是主动时,则用现在分词;例如:There are many people enjoying eating junk food.(enjoying是people的定语,主动)如果该动词与逻辑主语或者所修饰的词是被动时,则用过去分词;The bridge built last year is the longest one in our city.(built与bridge是被动关系)