他上大学以后就没学英语。A.He hasn’t learned English since he was a college student.B.He hasn’t learned English since he has been a college student.C.He hasn’t learned English since he left college.D.He hasn’t learned English since he has left college.
网友回答
B解析since后加短暂性动词的一般过去时或延续性动词的完成时。