Since he left after I have been looking for living.是什么意思?

Since he left after I have been looking for living. It's two years since he left his hometown.since 为什么不能换成after Since he left after I have been looking for living.是什么意思? Jim had turned off all the lights _______ he left the class.A.after B.until C.since D.before we left after he came back home he has been here since he left college.对since he left college提问 （）（）has he been here He didn’t tell me anything ______he left.A.until B.before C.after D.since并回答提问的问题(连词before与not...until的区别) It______five years since he has left for Beijing. he has left school since last week改错 He has left Beijing since two days ago改错 He has left Beijing since two days ago.改错急 The boy -------(live) in Nanjing since he left school. I have been ----(想念)him since he left. 英语 句型转换 Ten years has passed since he left here.---- ---- ten years ---- he left here 一道英译汉的题He hasn't left Quanzhou ever since he left school. We haven't heard from David since he left Shanghai.[对划线部分提问] since he left Shanghai[画线] We have't heard from David since he left Shanghai.(对划线部分提问,划since he left Shanghai） How long is it since he () his hometown?He () for nearly 10 years.A left;left Bhas left ;has leftChas left ;has been left Dleft ;has been left