用一般过去时代替完成时

英语语法,时态,一般过去时

1) 构成will / be going to do sth.

2) 概念  a. 状态完成:表示某事继续到将来某一时为止一直有的状态。 b. 动作完成:表示将来某一时或另一个将来的动作之前,已经完成的动作或一获得的经验。 They will have been married for 20 years by then. You will have reached Shanghai by this time tomorrow.