last year是一般过去时态的标志词。中文意思是“去年”
例如，去年我们村进行新农村改造，在村里共修了十多公里的水泥路面和栽种了各种树木花草。
For example, last year, our village carried out new rural reconstruction, and built more than ten kilometers of cement pavement and planted various trees and flowers in the village.
