As you write in the sky,it has been 20 years since I last sa

As you write in the sky,it has been 20 years since I last sa 请问It is six years since I last met you 与 It has been six yea I hope the sky is as blue as it has been in my dreams. It has been 5 years since I was away from the army,but now I 英语翻译【We will meet in dreams】It has been years since you and It's 3 years since I saw him last time.中的it's 能否换成has been? It has been 4 years since I smoked.怎么翻译? It has been 5 years since I smoked... It has been 4years since I smoked. It has been two weeks since I last wrote to you.意思? It is/has been 2 months since I last saw you翻译 It has been a long time since i saw you last time.