① 高中英语
It is 3 years since he worked here=he___here. left
worked 这里是延续性动词，since后用延续动词，表示不在从事这个动作了。短暂性动词，照译
It is 3 years since he smoked. 他有3年不吸烟了。
It is 3 years since he left the city.他离开这个城市有3年了
① 高中英语
It is 3 years since he worked here=he___here. left
worked 这里是延续性动词，since后用延续动词，表示不在从事这个动作了。短暂性动词，照译
It is 3 years since he smoked. 他有3年不吸烟了。
It is 3 years since he left the city.他离开这个城市有3年了