He described where they had landed and told how they were moving across the USA 为什么前面是过去完成时,而后面是过去进行时they were moving across
人气:309 ℃ 时间:2019-10-24 02:30:10
解答
had landed 是相对谓语described 来说的,由于先于described 发生,过去的过去,所以是过去完成时 were moving 侧重陈述过去的某一特定时候的情景,状态,所以用过去进行时 简单点说.用过去完成时,表示在过去某一特定事件以前做过某事 用过去进行时则表示在过去某一特定时间在做的事