l served in the company for 5years.这里的动词为什么可以用过去式,不是说for加一段时

l served in the company for 5years.这里的动词为什么可以用过去式,不是说for加一段时 完成时和过去式的判断Nana served as a photographer for five years in th He sat there,waiting for his son.这里的waiting后面为什么要加for啊 不是动词的 He lived abroad for many years.live不是动词吗?为什么可以加abroad这个副词呀? 为什么不用had served?His brother who served in the army for 8 yea 完成时的特殊情况吗?Mary___as a secretary in a company for 5 years,but life was hard for the working class.求分析句子,这里为什么要用过去式?这里was可以 l head for the company? He works for an IT company这里的work为什么要加s呀? 几句英语语法的问题1.Having worked in the company for two years,Mr.Smi 用适当形式填空：1.Mr Wang__(work) in the IBM Company for a few years she may be late for the football game .这里的for为什么不是做因为用