I've recorded this for you 和 I recorded this for you 区别?我在一个语言网站看到 ,一个人回答另一个人的问题：I've recorded this for you,这里为什么用 have recorded 而不用 I recorded this for you ?

I've recorded this for you 和 I recorded this for you 区别?我在一个语言网站看到 ,一个人回答另一个人的问题：I've recorded this for you,这里为什么用 have recorded 而不用 I recorded this for you ?
I've recorded this for you 和 I recorded this for you 区别?
我在一个语言网站看到 ,一个人回答另一个人的问题：I've recorded this for you,这里为什么用 have recorded 而不用 I recorded this for you ?

I've recorded this for you 和 I recorded this for you 区别?我在一个语言网站看到 ,一个人回答另一个人的问题：I've recorded this for you,这里为什么用 have recorded 而不用 I recorded this for you ?
现在完成时表示动作已发生并完成 过去式表示动作发生过,跟现在发生的事情没关系