Has the train arrived yet?

Has the train arrived yet? Has the train ——--yet A got to B reached C arrived D arrived The train hasn't arrived yet 问一个英语词汇题目-Has the train _____(arrive) yet?-Yes,it arrived te Has the post arrived yet?It may have arrived. Has it arrived yet? The train has arrived.这句中has起到了什么作用? has it arrived yet 中文翻译 The train has arrived.为什么要加had.还有啊~ The train has already arrived如何改为否定句 The train hasn't arrived yet.Could you tell me _________? The train is leaving right now but David hasn't arrived yet