prize多指在各类竞赛中或抽奖中赢的奖，这种奖有的是凭能力获得的，有的是凭运气获得的。
award多指为鼓励在工作上取得一定成就而正是颁发的一种奖励，强调荣誉。
reward多指对某人的工作或服务等的报答。
请看下面的例句：
1、He was awarded the Nobel Prize for Physics in 1986.
他获得了1986年诺贝尔物理学奖。
2、He won first prize at the Leeds Piano Competition...
他在利兹国际钢琴比赛中荣获一等奖。
3、The Institute's annual award is presented to organizations that are dedicated to democracy and human rights.
该协会的年度奖授予致力于民主与人权的组织。
4、Sue and John were especially thrilled with this award.
休和约翰对于获得这个奖项感到兴奋不已。
5、She presented a bravery award to schoolgirl Caroline Tucker.
她向女学生卡罗琳·塔克颁发了英勇奖状。
6、He was given the job as a reward for running a successful leadership bid.
因为成功组织了领导职位竞选活动，他得到了这份工作。
7、The firm last night offered a ￡10,000 reward for information leading to the conviction of the killer.
昨晚这家公司悬赏 1万英镑，寻找能将凶手定罪的证据。
8、The company is just starting to reap the rewards of long-term investments.
这家公司正开始收获长期投资的回报。
