should的倒装
Users may create a swap space during installation of Arch Linux or at any later time should it become necessary
这里的should分析下
人气：154 ℃ 时间：2020-05-26 05:59:29
解答
should it become necessary=if it should become necessary
在if虚拟从句中,如果含有should,were,had ,就可以把if省略,然后将should,were,had提前,构成倒桩句式.
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