1.reward用作名词时的意思是“报酬”,转化成动词意思是“酬谢,奖赏”,指对某人的所作所为给予一定的报酬作为奖励。
2.reward多用作及物动词,后接名词或代词作宾语。可用于被动结构。

reward for(v.+prep.)
由于…而给予(…)报酬 give a reward to sb for sth
▲reward sb for sth/v-ing
Is that how you reward me for my help?那就是你为了我的帮忙而给我的报酬吗?
I shall reward him for his services.对于他的帮助,我会酬谢他的。
We rewarded him for finding our lost cat.他把我们丢失的猫找了回来,我们因此奖赏了他。
◇ 用于be ～ed结构
In our society, children are rewarded for good behaviour.在我们的社会,规规矩矩的孩子要受到奖赏。

用作及物动词
▲S+～+n./pron.
How can I reward your kindness?我怎样才能报答你的好心呢?
I shall reward his services.我要酬谢他的劳绩。
Success rewarded his efforts.他的努力获得了成功。
◇ 用于be ～ed结构
Anyone returning the necklace will be handsomely rewarded.送还项链者将得到丰厚的酬金。
Those who protect the oil field will be rewarded.保护油田者有奖。
Our efforts were rewarded by success.我们的努力获得了成功。

reward, award
参见award条。

［同义词］ n.  compensation, payment, prize
［反义词］ n.  fine, punishment
［词源］＜中古英语rewarden(报酬)

in reward
作为酬报as return for doing sth good or valuable
I don't expect anything in reward.我不指望得到任何酬报。
He received a medal in reward for his bravery.他因勇敢获得一枚奖章。

He will expect some reward after working so hard.他工作很努力,将会得到报偿的。
The police are offering a big reward for information about the robbery.读书所得到的报酬不能以金钱衡量。
The police are offering a big reward for information about the robbery.警方出大笔赏金要求提供那起抢劫案的破案线索。
As a reward for passing his examination, he got a new watch from his parents.作为对他通过考试的奖赏,父母亲送给他一块新的手表。

reward, prize
这两个名词的共同意思是“奖赏”。prize指在比赛中获得好成绩而受奖,通常为奖杯或钱物; reward指由于某种行为而获得奖励,尤指金钱等形式的奖赏。