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题目
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.

提问时间:2021-03-25

答案
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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