It's+been++a+long+time.been在这里起什么作用?为什么要用been

It's been a long it's been a long It's been so long It's been a long day.如何直译? Hi Mary It's been a long time .语法填空 It's a long time since还是It has been a long time since It's+been++a+long+time.been在这里起什么作用?为什么要用been 找一首英文歌 第一句是it s been a long long time it's been a long day句型这句话 和it's a long day的区别 It's A Long It's a long It's been so long中文意思 It's been so long since I had been a teacher.请问这句好如何翻译? It's been a long time since I met you last 译成中文 That‘s e__ what I need!I have been looking for it for a long time 英语翻译When we were young Funny how things just tasted better When we were young When we were young Funny how things just seemed so easy When we were young It’s been a long day It’s been a long day It’s been a long day It’s been a long d what a long time he's been waiting,isn't it? what a long time he's been waiting,isn't it?对吗,为什么