There weren't any in sight.They _____.(事情是这养的:几个孩子闯了祸都跑光了,我的视线里没有人了).couldn't be seen .weren't seen 为什么选前一个 后一个不选

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There weren't any in sight.They _____.(事情是这养的:几个孩子闯了祸都跑光了,我的视线里没有人了).couldn't be seen .weren't seen 为什么选前一个 后一个不选

There weren't any in sight.They _____.(事情是这养的:几个孩子闯了祸都跑光了,我的视线里没有人了).couldn't be seen .weren't seen 为什么选前一个 后一个不选
There weren't any in sight.They _____.(事情是这养的:几个孩子闯了祸都跑光了,我的视线里没有人了)
.couldn't be seen .weren't seen 为什么选前一个 后一个不选

There weren't any in sight.They _____.(事情是这养的:几个孩子闯了祸都跑光了,我的视线里没有人了).couldn't be seen .weren't seen 为什么选前一个 后一个不选
conlud't 强调的是不能,一种可能性,相当于对前一句的解释
weren't 只是一种过去状态.

应该是从意思上理解,couldn't be seen,更好一些。
他们不能被看到。

前一个是主观,后一个是客观,
既然是我看不见了,那就是主观