should 虚拟语气倒装句用法

He tells her not to expect him certainly by the return coach, nor to be alarmed should he remain gone three or four days.

should he remain gone three or four days 这是是倒装句式吗，为什么在这里用倒装?

should he remain gone three or four days

= if he should remain gone three or four days

if从句可以省略连词if，而将虚拟语气的were, had, 及推定式should倒装。例如：

If he had come,...

Had he come,...

If he were to come,...

Were he to come,...

If he should come,...

Should he come,...

曹荣禄 -

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