i have been here since 1999 我从1999年开始在这住

i have been here since 1999 我从1999年开始在这住 I HAVE BEEN HERE SINCE TIME 在英语现在完成式中 i have lived here since my childhood.i have been i I have lived here since then还是I have been here since then对啊? I have been here since three yeas ago I have been here since I was born 和I haden't seen him since 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 I have been here since last month.（对since last month部分提问） ha I have been here since 1976.请教been(be)的用法. i have know him since i have been here.为什么不成立 have been here 后面可不可以用since they have been here since 2000