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U nit91.要是那个国家的人不自相残杀的话,他们就会过上幸福的生活。【误】Ifthe people in thatcountry were not killing each other,theywere living a happy life.【正】Ifthe people in thatcountry were not killing each other,theycould be living a happy life.【析】如果虚拟条件句中的谓语动词用进行时,表示“如果……正在……”,主句的谓语