Number + 年 + 来
年 (nián) is used to express a number of years or a specific year. When combined with a number, it indicates a time span. For example, 二十年来 means "over the past twenty years."
他在这家公司工作了十年了。
Tā zài zhè jiā gōngsī gōngzuò le shí nián le.
He has worked at this company for ten years.
我们三年没见了,你变化好大。
Wǒmen sān nián méi jiàn le, nǐ biànhuà hǎo dà.
We haven't seen each other for three years; you've changed so much.
这座桥有两百多年的历史了。
Zhè zuò qiáo yǒu liǎng bǎi duō nián de lìshǐ le.
This bridge has over two hundred years of history.