I have been here是“我来过这里”还是“我在这里” “have been”到底有几种解释?

I have been here是“我来过这里”还是“我在这里” “have been”到底有几种解释? 英文翻译：我不该在这里 是说i should not be here 还是 i should not have been 简单英语练习题我2点30就在这里了.能不能说I have been here at 2:30.那么，这里的at 2:30 I have been here since 1976 这里的have 是实意动词吗?那么在现在完成时中是不是没有助动词 英语翻译我已经离开这里三年了 英语翻译,电脑翻译为I have been away from here for thre 英语翻译Where have you _____?I got here ten minutes ago.这里是用been 英语翻译我没意识到以前曾来过这儿.I'm not aware of that he had been here.have 我在这里已经工作2年了（现在还在这里上班）,I have worked here for 2years 还是I have I have been here for two days.这里for可以去掉吗? I have been busy since yesterday.现在完成时是have加过去分词,但这里的过去分词在哪里 我去过动物园很多次 是I have been to zoo many times 还是I have been to zo i have never been here还是i have never been in here