last year是什么时态的标志词

　　This year's results are virtually the same as last year's.

　　今年的结果几乎和去年的一样。

　　Company profits were 5% lower than last year.

　　公司的利润比去年降低了5%。

　　The hospital closed at the end of last year.

　　这所医院去年年底关闭。

　　The new wing was built onto the hospital last year.

　　医院的新翼楼是去年增建的。

　　Sales are well up on last year.

　　销量比去年大幅增加。