2014年12月英语六级16大经典时态分析:过去将来完成时 1.概念:表示在过去某一时间对将来某一时刻以前所会发生的动作,常用在虚拟语气中,表示与过去的事实相反。 2.基本结构:should/would have done sth. 3.例句: I thought you'd have left by this time.我想这会儿你已经走了。 He told them he would have finished it by 8 o'clock.他告诉他们他会在8点以前干完。