It has been a long 我知道是“好久没见面了”但是句中并没有否定词,为什么是否定的意思呢?

it has long been assumed It has been a long time.Are you ok? it has been a long time. what is up It's a long time since还是It has been a long time since it has long been known that It's been a long it's been a long 请问有首英文歌曲,歌词有句是honey,it has been a long time,……long long time 叫什么? It has a long neck . It has been a long time since we last wrote to each other. it has been a long time since+?since后面加什么形式? It’s has been quite a long time我想说好久不见 正确的应该怎么写 it has been the case for a long time that...这句话正确吗? It has been proven that information technology can give a firma long-lasting competitive advantage It has been a long 我知道是“好久没见面了”但是句中并没有否定词,为什么是否定的意思呢? How long is it since he () his hometown?He () for nearly 10 years.A left;left Bhas left ;has leftChas left ;has been left Dleft ;has been left 英语It's been a long time.这句话不太理解It's been a long time.很长时间没见了这句话中的a long time表示很长时间,但是has been怎么表示没见了?我知道这个意思,但还是不太理解.会语法的朋友可以跟 has long been同义词