英语语法—虚拟条件句的倒装

    上海新东方夏令营，介绍
    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.
    注意：
    在虚拟语气的从句中，动词'be'的过去时态一律用"were"，不用was， 即在从句中be用were代替。
    If I were you, I would go to look for him.
    如果我是你，就会去找他。
    If he were here, everything would be all right.
    如果他在这儿，一切都会好的。