94.故障
[误] It is time that we stop the machine and find the trouble.
[正] It is time that we stopped the machine and found the trouble.
翻译：该停机检查故障了。
讲解：It is time that...表示“是......的时候了”，其后的从句应采用过去时态，这是虚拟语气的要求。
更多口语例句：
He always repairs to his friends when he has trouble.
他遇到麻烦事时总是求助于他的朋友们。
