虚拟语气中何时一定用should

虚拟语气中何时一定用should

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第1个回答 2007-04-01

与现在事实相反：if+主语+were/did/were doing, 主语+should/would/might/could do
与过去事实相反：主语+had done,主语+should/would have done//might/could
与将来事实相反：if+主语+were/did/were to do,主语+should/would do//might/could
if+主语+should do,主语+should/would do//might/could

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