they even didn't know who you were.how______they

they even didn't know who you were.how______they i didn't even fucking know you they even dont't know who you are. how ——they ——(believe)you didn't know you were so busy. 听力的一段对话,W:This is all news to me.I didn't even know you were 英语翻译"And i learnt there were children who didn't even have s -Hello,i didn't know you were here. I didn't know you were in China . Hello!I didn’t know you were here. I didn't know you were so busy一般疑问句 I didn't know you were so busy. Sorry I [didn"t] know you were sick.括号中为什么用didn"t.