单选 I'm sorry that I _____ you were here.A didn't knowB don't know这两个答案是不是都可以呢?
问题描述：
单选 I'm sorry that I _____ you were here.
A didn't know
B don't know
这两个答案是不是都可以呢?
答
是A，不能B
答
应该是“didn't know”因为是刚刚（过去时）不知道，而现在（现在时）已经知道了
大概是这样的
答
I'm sorry that I _____ you were here.
选A
一般现在时的虚拟语气用一般过去时表示。
译：很抱歉，我原来没想到你在这。
答
A didn't know
虚拟语气表假设
答
当主句为一般现在时
从句可以是任意时态
AB均可
答
A didn't know
后面用的是 you were here.
答
很抱歉，我原来没想到你在这。
--现在我知道了。所以用过去式
答
这题选择A答案,答案唯一
说这句话的时候说话人已经知道这人在这了,所以这里用过去时表示先前不知道.类似的还有:
I didn't recognize you.高二课本中的句子
提醒:这题和虚拟语气无关!
答
A