这么英语句子里的should是什么用法呢?Meanwhile the US is preparing financial sanctions against both officials and protest leaders should the violence worsen,according to US congressional aides.如题,should the violence worsen是表假设

这么英语句子里的should是什么用法呢?Meanwhile the US is preparing financial sanctions against both officials and protest leaders should the violence worsen,according to US congressional aides.如题,should the violence worsen是表假设
这么英语句子里的should是什么用法呢?
Meanwhile the US is preparing financial sanctions against both officials and
protest leaders should the violence worsen,according to US congressional aides.
如题,should the violence worsen是表假设的吧,语法是怎么样的

这么英语句子里的should是什么用法呢?Meanwhile the US is preparing financial sanctions against both officials and protest leaders should the violence worsen,according to US congressional aides.如题,should the violence worsen是表假设
虚拟语气,表示对将来情况的假设.在IF从句中,可以省略IF将 should放在句首.就是等于 the violence should worsen 万一暴力事件恶化

应该是虚拟语气中省略If的用法

应该是虚拟语态