It's been a long

It's been a long It`s been such a long week. it's been a long day句型 It's been so long Hi Mary It's been a long time .语法填空 找一首歌.歌词里有一句“it s been a too long time” It's been a long day.如何直译? 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 It has been a long It's been a long time since I last saw a film.还是It's a long 关于完成式和过去式It's been a long time since I've seen it.It's been