对 I have been here for 15 hours 就划线部分提问for 15 hours 就划线部分提问并否定句回答快

I have lived here since then还是I have been here since then对啊? i have been here many a I HAVE BEEN HERE SINCE TIME o,i have been here before是什么意思 I have been here since last month.（对since last month部分提问） have you been like this? i have never been here还是i have never been in here I have been here 与I have been living here一样吗?有点弄不清楚. they have been here since 1988,对1988进行提问,（）（）have they been here? I have been here before.Is this correct?我曾经在这里.1）I have been here before.2）I have been here. I have already been here for 5years =I have been here_____5 years______ I have been here to meet you again I have been here ( )1980要填什么 I have been to you here这句话是什么意思 I have been here for three months.同义句 i have been here ( )a year.A,since B,for i have been here for three months同义句 I have been here since three yeas ago 请问“I shouldn't have been here.”怎么翻译?