It _____(snow) when we got to the top of the mount

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It _____(snow) when we got to the top of the mount

It _____(snow) when we got to the top of the mount
It _____(snow) when we got to the top of the mount

It _____(snow) when we got to the top of the mount
was snowing.
when引导时间状语从句有两种用法.
1.主将从现.
2.主:过去 从:过去.注意:如果动词是持续性动词,那么用过去进行时.如果是瞬间动词,则用一般过去时.snow持续性动词,所以过去进行时.

snowed,用动词过去式,当我们到达山顶时在下雪

was snowing
当我们到达山顶的时候,正在下雪呢。

was snowing
when 引导的时间状语从句
从句用一般过去时 主句用过去进行时