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Should it rain,the crops would be saved.=Were it to rain,the

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Should it rain,the crops would be saved.=Were it to rain,the crops would be saved.
这个句子有没有错误啊?不是应该还原If吗?最好全面点
虚拟条件句谓语动词的构成形式:
与将来事实相反
条件状语 A:谓语动词用动词过去式
B:位于永were to + 动词原形
C:谓语用should +动词原形
主句 A:助于+would(或should)+动词原形
B:祈使句
其中,B和C的区别“were to + 动词原形"比"should +动词原形"所表示的实现的可能性更小.
楼主说的还原if,是当从句中有were,had,should,would等放在主语前可构成疑问句的词时,可省略if,用倒装形式、.
Should it rain,the crops would be saved.还原就是If it should rain,the crops would be saved.
Were it to rain,the crops would be saved.比Should it rain,the crops would be saved.下雨的可能行小,意思有细微差别.语法没有错