过去时和完成时问题Before he retired ,he was the head of the factory.与

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过去时和完成时问题
Before he retired ,he was the head of the factory.与before he retired ,he had been the head of the factory.哪个正确?如都正确,有什么区别?

两个句子翻译都一样
在他退休之前,他是工厂的老大
前一句强调的是动作,他过去是工厂的老大
后一句强调的是时间,过去的过去他是工厂的老大
过去时表示过去某时发生的动作或单纯叙述过去的事情,强调动作；
过去完成时:表示过去的过去
----|-------|-----|---->其构成是had +过去分词构成.
那时以前那时现在

过去时和完成时问题Before he retired ,he was the head of the factory.与关于新概念英语二的第31课,Before he retired,Frank was the head of a very 英语时态问题,过去进行-和完成时. 有什么区别例如He was always working-He had alway 英语时态问题,过去进行-和完成时.有什么区别例如He was aways working-He had aways w he was very ill before he died为什么he was very ill先完成的动作不用过去完成 He in the factory for three years before he joined the Army. he was very busy in the factory .he was very hungry when he So he put his head out of the window to find out what was ha He retired immediately after the end of the war. 翻译成：他在战争之后马 He could see the tall chimneys of the factory ______. He is not the man that he was before. He cut in at the head of the line