虚拟条件句的从句一部分假如带有were, should, 或had, 可将if省去，再把were, should或had 挪到从句句戳心首，推行部分倒装。
　 Were they here now, they could help us.
　=If they were here now, they could help us.
　 Had you come earlier, you would have met him
　=If you had come earlier, you would have met him.　
　 Should it rain, the crops would be saved.
　=Were it to rain, the crops would be saved.

留意：
　 在虚拟语气的从句中，形容词'be'的过去时态一律用"were"，无需was， 即在从句中be用were替代。
　 If I were you, I would go to look for him.
　　 如果我是你，便会去找他。
　 If he were here, everything would be all right.
　　 假如他在这里，一切都是会好的。

典型性练习题
　_____ to do the work, I should do it some other day.
A. If were I　　 B. I were　C. Were I　D. Was I
　 回答C. 在虚似条件状语中如果有were, should, had这三个词，一般将if省去，主语提早, 变为 were, should, had 主语的方式。但要留意，在虚似标准状语从句中，省去连词的部分倒装方式的句首不能用形容词的缩略方式。如大家可说 Were I not to do., 而不能说 Weren't I to do.