james has just arrived,but i didn't know he __until yesterdy

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james has just arrived,but i didn't know he __until yesterdy.
为什么要选was coming,不能选had been coming呢?
had been coming 不是可以表在james arrived的过去一直做吗?对现在有影响啊~为什么不行?

这句话的意思是,JAMES已经来了,但是直到昨天我都不知道他会来.was coming 在这里表示在昨天之前的将要来的一种状态.而 had been coming 则表示处于一直来的状态,不合句意.并且come是瞬时动词,一般不用表示持续性动作的时态.

james has just arrived,but i didn't know he __until yesterdy 英语语法问题1 james has just arrived,but i didn't know he __until Jams has just arrived,but I didn't know he __until yesterday 解释几个英语语法题.121, James has just arrived, but I didn’t know he James has just arrived,but I didn't know he _____ until yest James has just arrived.but i didn't know he 【】until yesterd James has just arrived,but I didn't know he ____ until yeste 1.James has just arrived,but I didn't know he ____until yest James has just arrived,but I didn't know he came until yeste James has just arrived,but I didn't know he__until yesterday 两个英语单选题1.James has just arrived,but I didn’t know he________ James had just arrived ,but I didn't know he ______ until ye