i've been here before 这句是什么语法啊?

I'Ve Been Here 歌词 ‘I've been here’这翻译成中文是什么意思 i've been here before 这句是什么语法啊? I've been here for three months的同义句 I've been working here for seven years.同义句转换.I've been working here ___ ____ ____ ____. i've never been here是什么歌,是一个女的唱的i've never been to me I've been here since 1976.为什麽要用been?如果改用lived可以吗? it,s been raining the whole time i've been here! 用since和for填空i’ve been here------two years i’ve been here------ yesterday i’ve been here-------i was a child i’ve been here-------two years agohe’s been in class --------4 o’clockhe’s been in class --------an hour agohe’s been I've been expecting I've been cryin Ive been to I've been filming. susan arrived here a week 空格,and has been here ever 空格.a.befor;ago b.befor;since c.ago;befor d.ago;since 选一个 过去完成时可以have+动词过去分词,也可以have+been如I've lived here since 1987或I've been here since1987吗 I've been working here for seven years.(改为同义句）句式：I‘ve been working here －—　——　—－　—— I've never been here 什么意思这是一个句子 这句话是什么时态It feels like I've been here before