have .since did区别have .since have done?eg：I haven’t seen you since I’ve been back.I haven’t seen you since I was back.

have .since did区别have .since have done?eg：I haven’t seen you since I’ve been back.I haven’t seen you since I was back. Confucius said, “Since the age of 15, 翻译Confucius said, “Since the age of 15, I have devoted myself to learning; since 30, I have been well established; since 40, I have understood many things and have no longer been confused; since 50, I hav I did go there just before the war,but I have't gone there since.did go there换成had gone there行吗?如果都对那两种说法有什么区别 great changes take place since liberation 和 Great changes have taken place since liberation的区别 have you ever 和 did you ever区别,如何区别 how long ()you joined the league?A have B did C is it since D were continue to have dreams,continue to hav 中文意思? have since been 和 have been since i did my homework instead of watching tvi did my homework ____ ____ ____tvwe have learned english since two years ago____ ____ have u learned english?`````` when you have lived here?since then you have lived here?区别 did you和 have you 的用法区别 英语现在完成时题?在A、B、C、D四个选项中,选择与所给句子意思相同的选项1.I last saw her two months ago.A.I have seen her since tow months ago.B.I have seen her for two months.C.I haven’t seen her since two months.D.I hav why did not you catch the bus ____i told you to.a while b as c since d although 判断选择的原因.while as since although 的 区别.one tree after another went down cut down by the water ,which ___3 meters deep.a must have down b can be c can ha 英语翻译1,-How long ___you ___a fever?-Ever since last night.A.have,got B.have hadC.have caughtD.did have great changes have taken place in our school since the government did something to cotrol schoolgreat changes have taken place in our school since the government did someth to cotrol school management 作文 一：It is a pleasure.With pleasure.二：It is five year It is my pleasure.分别用法及意思二 It is five years since I {met} you last time.为什么用met却不用have meet三 So did she 和 So she did 的区别及解释、用法. you have been playing golf since you were 16 years old when did he begin to play golf Did you ever...和Have you ever...有什么区别?什么时候用Did you ever...什么时候用Have you ever...