一道英语选择题的疑问?I( )as a writer for five years,which cotributes a lot to my today's work.答案是选served,为什么不选have served,现在完成时不是过去发生的事对现在造成的影响和结果么?题中是过去发生的

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一道英语选择题的疑问?I( )as a writer for five years,which cotributes a lot to my today's work.答案是选served,为什么不选have served,现在完成时不是过去发生的事对现在造成的影响和结果么?题中是过去发生的
一道英语选择题的疑问?
I( )as a writer for five years,which cotributes a lot to my today's work.答案是选served,为什么不选have served,现在完成时不是过去发生的事对现在造成的影响和结果么?题中是过去发生的也对现在造成影响了啊?

一道英语选择题的疑问?I( )as a writer for five years,which cotributes a lot to my today's work.答案是选served,为什么不选have served,现在完成时不是过去发生的事对现在造成的影响和结果么?题中是过去发生的
for+一段时间是可以跟过去时态连用的,只要是持续性的动词就行.
通过句子来看,说话者过去是作家,现在不是了.如果选have served 就表示现在还是作家.再如：
I smoked for 10 years,but now I'm a non-smoker.
此处不能用havesmoked

因为此处在描述在过去一直做的一件事情，即“作为写手进行工作”，因为是经常做一直做的事情，所以用一般过去时served即可。
现在完成时偏重持续到现在，很明显，“我”现在不再从事写手这类初级工作了，而是成为大作家了。

根据从句说明当作家是过去的事，则用过去式。
如，He worked in the USA for 20 years but he never regrets coming back to his country ,

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I( )as a writer for five years,which cotributes a lot to my today's work. 答案是选served, 为什么不选have served,现在完成时不是过去发生的事对现在造成的影响和结果么?题中是过去发生的也对现在造成影响了啊??
答：我很怀疑原题句中的writer为waiter之笔误，因为你给的选项中的谓语动词是serve
如果是writer的话，用work可能更好一些。
一会网上去找一找。
从后半句可知道，我原来做过的事对现在的工作有影响，所以可以知道当服务员是以前的工作，用过去完成时。
译:我曾经当过五年的服务员，这对我现在的工作有很大的帮助。

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