Has the train (arrive) yet?用什么形式呀?

After The Train Has Has he caught the train to The train has just left the station.可不可以写成The train just has left the station. Has the train .Has the train （ A arrived B reachedC got toD arrived in理由 The train has arrived.这句中has起到了什么作用? Could you tell me when_____?A.the train has left B.the train leaves选择哪一 ce train qui s'en va是the train is leaving的意思还是the train has left的意思? Could you tell me when _____?A.does the train leave B.will the train leave C.the train has leftD.the train leaves The train has been here ten minutes.改错 The train has been here ten minutes.改错 Has he caught the train to London是什么意思 The train has left here 可不可以这样说 The train has already arrived如何改为否定句 Has the train (arrive) yet?用什么形式呀? 翻译The train which has just left is fof shanghai I'm here could tell me______,please A.when does the first bus arriveB.when the first bus arriveC.when did the first bus arriveD.when will the first bus arrive I'm here could tell me______,please A.when does the first bus arriveB.when the first bus arriveC.when did the first bus arriveD.when will the first bus arrive Could you tell me when _______? A.the train has left B.the train leaves请帮忙 具体解释一下