didn't know you were so busy.

didn't know you were so busy. I didn't know you were so busy一般疑问句 I didn't know you were so busy. l didn't know you were so busy ,这里怎么有两个过去式? 英语句子改错：I didn't know why you were so busy in the last there 英语翻译I didn‘t know you were coming,so I didn’t buy any beer.( Honey,I didn't know that you were so much concerned with the they even didn't know who you were.how______they -Hello,i didn't know you were here. I didn't know you were in China . Hello!I didn’t know you were here. Sorry I [didn"t] know you were sick.括号中为什么用didn"t.