Our plans were upset by the sudden change in the weather.中为什么用were而不用are
问题描述：
Our plans were upset by the sudden change in the weather.中为什么用were而不用are
答
时态.were一般过去时,are一般现在时.
这件事是过去发生的,是已经发生的,一般现在时则表示时常、普遍会发生的事情.