Question

I have used the old laptop during five years.为什么d

I have used the old laptop during five years.为什么during要改成for

Answer 1

现在完成时由助动词have、has加上动词的过去分词构成，规则动词的过去分词是在动词原形后加上-ed，不规则动词的过去分词要单独记忆。
现在完成时的基本含义是一个动作从过去延续到现在，与之相搭配的介系词或连接词应该是for（表示持续，后加一段时间）或since（自从，后加表示过去时间点的短语或从句），而不是during，如：
I have used the old laptop for five years.
I have learned American English for three years.
We have known each other since we were children.
I have had a headache all day long.
How long has he played the piano? He has played it for two hours.

Answer 2

这个句子属于现在完成时。for加时间段表示在这段时间内所完成的动作。