英语 语法don't leave until tje train arrives这里为什么要用arrives?

英语 语法don't leave until tje train arrives这里为什么要用arrives? Don’t put off until tomorrow what can be done today.为什么这里要用d My train arrives at 10:00 am tomorrow 为什么不用将来时? 仿写英语句子1.They are working hard.The train arrives late.The boy 英语单选1.His train arrives in Beijing at seven o'clock tomorrow _______ he does his work,I don't mind what time he arrives a The train arrives at the station twenty minutes later. The train arrives at the station twenty minutes later.why? My train arrives at 10:00am tomorrrow. He arrives home.为什么home前不加介词 9. Don’t leave the room until 翻译the train shouldn't leave until 12