act,react,interact是动词,在句子里用做谓语.例如:He acts as a ninja in the movie.(他在电影中扮演一个忍者)He reacts strangely.(他反应奇怪)Different parties should interact with each other frequently.(不同的党派彼此之间应该经常交流)action,reaction,interaction是名词,在句中用做主语,宾语,表语或另一个名词前对该名词做限定例:He acts as a ninja in the action movie.(他在这部动作片中扮演一个忍者)His reaction is strange.(他的反应很怪)The interaction between different parties is necessary.(不同党派间的互相沟通很有必要)注:是abundant,abundanceabundant是形容词,在句中修饰名词例:Oil is abundant in this area.(这个地区石油充足)abundance是名词例:The abundance in oil makes the country very rich.(石油上的充足让这个国家十分富有)abound是动词例:Oil abounds in this area.(这个地区石油充足)