it's been a while since I've been here翻译是 我有一段时间没来了 还是 我来了有一段时间了?

问题描述:

it's been a while since I've been here翻译是 我有一段时间没来了 还是 我来了有一段时间了?

释义为我来这儿已经有一段时间了。

我来了有一段时间了.~...
前者是,, It's been a while since I left...

这个句子好像是有问题,我认为应该是:It's been a while since I came here.=It's a while since I came here.我有一段时间没来了.
It is +段时间+since 从句(用过去时)