It three years since I smoked.翻译

It three years since I smoked.翻译 It is three years since he smoked. It has been 4 years since I smoked.怎么翻译? It's three years since I smoked 这句话什么意思,理解不了 It has been 5 years since I smoked... It has been 4years since I smoked. 翻译 It's five years since he smoked It has been 2 years since He smoked since 2 years ago .怎么翻译?等不等于It is 2 years since he It is five years since he smoked 英语翻译It's two years since i smoked.常常让我不知道怎么翻译Thanks a lot. How many years is it since the writer smoked?怎么翻译 英语翻译是不是翻译为：it is 3 years since he has smoked.