定语从句状语从句虚拟语气(共5页).doc

精选优质文档-倾情为你奉上虚拟语气一、虚拟语气在if条件从句中的用法。条件从句中谓语动词主句中谓语动词表示与现在事实相反did (be用were)would (should, could, might) +do表示与过去事实相反had donewould (should, could, might) +have done表示与将来的事实可能相反did/were 或should do 或were to dowould (should, could, might) +do例如：1、If everyone in the country knew first aid, many lives would be saved.2、If the hurricane had happened during the daytime, there would have been many more d