It is three years since she was in the

It is three years since the war broke out. It is three years since he smoked. 求It is three years since he worked in his office.解释下since t is three years since he joined the League?it is three year 英语翻译it is already three years since he was a teacher是他不当教师已经 it is three years since she came to Nanjing(改为同义句) ---- ---- It's three years since he was married .的翻译 It was three years ago that he joined the army与It is three y It is three years since I joined the army.改成完成时态 I It is three years since you went,The perfume you left behind It is three years since he joined the army.为什么是用joined而不是用ha She have bought the computer since three years ago