英语简单的一句小句子时态When I stepped onto the bank,some of the others were already putting up the tent.这句were already putting up the tent为什么答案写的是用过去进行时呢?some of the others already put up the tent.用过

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英语简单的一句小句子时态When I stepped onto the bank,some of the others were already putting up the tent.这句were already putting up the tent为什么答案写的是用过去进行时呢?some of the others already put up the tent.用过

英语简单的一句小句子时态When I stepped onto the bank,some of the others were already putting up the tent.这句were already putting up the tent为什么答案写的是用过去进行时呢?some of the others already put up the tent.用过
英语简单的一句小句子时态
When I stepped onto the bank,some of the others were already putting up the tent.
这句were already putting up the tent为什么答案写的是用过去进行时呢?some of the others already put up the tent.用过去式不行吗?

英语简单的一句小句子时态When I stepped onto the bank,some of the others were already putting up the tent.这句were already putting up the tent为什么答案写的是用过去进行时呢?some of the others already put up the tent.用过
过去完成式是已经搭好了
过去进行时是当时还在搭
过去式不必用already

不行，所表达的意思不一样的。stepped onto 这个动作发生的时候，put up 这个动作正在进行中，还没有结束。

When I stepped onto the bank，some of the others were already putting up the tent.
这句were already putting up the tent为什么答案写的是用过去进行时呢？some of the others already put up the tent.用过去式不行吗？
因为【When ...

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When I stepped onto the bank，some of the others were already putting up the tent.
这句were already putting up the tent为什么答案写的是用过去进行时呢？some of the others already put up the tent.用过去式不行吗？
因为【When I stepped onto the bank】那一瞬间，其他一些人【已经正在搭帐篷了】

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when 引导的时间状语从句，当什么的时候，他们正在怎么样，所以一般都是进行时的

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