五十的英语是fifty。fifty主要用作数词，作数词时意思是：五十个人; 五十岁; 五十年代; 编号为五十的东西五十; 五十个。fifty的复数形式是fifties。
一、fifty双语例句
1.Fifty is the new forty.
四十尚未老，五十正当年。
2.The house is set in fifty acres of parkland.
房子四周是五十英亩草地。
3.That would probably cost you about fifty bucks
那大概要花掉你50美元左右。
4.He is fifty and has been through two marriages
他今年50岁，经历过两次婚姻。
5.There were over fifty applicants for the job.
有五十多人申请这个工作。
6.We have invited fifty people altogether.
我们共邀请了五十人。
二、数字10-100英语单词
ten 10
twenty 20
thirty 30
forty 40
fifty 50
sixty 60
seventy 70
eighty 80
ninety 90
one hundred 10
