摘要：用法: 表示在将来的某一时刻之前将要完成的动作, 这一动作也可能继续进行 a. By seven o’clock this afternoon we shall have arrived in Shanghai if the train keeps good line. b. Before noon we will have completed this work.

网址：http://m.1010jiajiao.com/timu_id_4146681[举报]