James has just arrived,but I didn't know he came until yesterday正确答案是James has just arrived,but I didn't know he was coming until yesterday上面我写的为什么不对为什么不能用came回答：he came是他来了,昨天他还没来

Question

James has just arrived,but I didn't know he came until yesterday
正确答案是James has just arrived,but I didn't know he was coming until yesterday上面我写的为什么不对为什么不能用came
回答：he came是他来了,昨天他还没来呢,他要来而已
疑问：上面回答的意思是他昨天没来,这个信息是从james has just arrived得来的吗,
现在完成时不是表示过去发生并且已经完成的动作对现在造成影响或后果,所以我觉得也可说明JAMES昨天就来了,都是过去为何过去式came 不对而过去进行was coming 对?
until这个时间状语只能用在过去完成和现在完成,所以那个都不对吧应该用had came是不是呢

Answer 1

你忽视了just这个词.has just arrived是刚到,即说话时刚刚到.如果是昨天来的就不能用just这个词了.
如果没有just,则用had come 或者 was coming 都可以,因为无从判断其到达的时间.
be coming(going,arriving,leaving)可以表示即将到或者离去的意思.和is going to come差不多.