下述句子（见补充说明）中的should是什么用法?难道should也可以表“可能”之意吗?

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/11/07 23:48:14

下述句子（见补充说明）中的should是什么用法?难道should也可以表“可能”之意吗?
In the case of fine art,paintings,or jewelry,color photographs can sometimes be of assistance to the police should you be unfortunate enough to have them stolen.

1.此句中的should表示条件,翻译为“万一”.
2.句中采用了if引导的条件状语从句的虚拟语气的倒装语法.
即：should you be unfortunate enough to have them stolen
= if you should be unfortunate enough to have them stolen
3.相关语法规定如下：
1）if引导的条件状语从句,如果使用虚拟语气对将来的倒装进行虚拟时,则if从句可以使用“should + 动词原形”或“were to do sth”或“动词过去式”来做谓语,主句则使用“would/could/might + 动词原形”做谓语结构.
如：If it should rain tomorrow,I would stay at home.
= If it were to rain tomorrow,I would stay at home.
= If it rained tomorrow,I would stay at home.
2) 而且,如果if引导的使用了虚拟语气的条件状语从句,且其含有should/had/were时,则可以把这三个词中任意一个提前至从句句首,并省略if.
如：If it should rain tomorrow,I would stay at home.
= If it were to rain tomorrow,I would stay at home.
= Should it rain tomorrow,I would stay at home.
= Were it to rain tomorrow,I would stay at home.

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