i didn't understand 与 i don't understand的区别?我知道时态不同,但我在对话时看到DIDN'T,一个人没听懂另一个人说什么,然后请他重复一遍,用的是：i didn't understand you,can you repeat that please?我原来都用DO

He said something () i didn't understand. I didn't understand what you said.(同义句转换） I didn't understand () () I didn't quite understand what u said 翻译 ：I just didn't understand how that was fair. Sorry,I didn't understand you said翻译一下 I hope you understand me and didn't mean that. Please say a_____.I didn't understand you just now i didn't understand the problem until it_____(explan) again I didn't really understand 我不太懂 I really didn'tI didn't really understand我不太懂I really didn't understand这两个句型都是正确的嘛各位亲? I feel now the truth of these words ,which i didn't understand before.. I didn't understand, now know that love a person will always see only merit是什么意思? I didn't understand what you said it's too hard I didn't understand what you said it's too hard You didn’t understand what I said,for you _______ to me just now ______I didn't understand thewords,I knew what he wanted?A.BecauseB.UnlessC.Even ifD.If Could you_that in English?I didn't understand what you sald.填空 Please say it a_____.I didn't understand you iust now. I didn't qutie understand .qutie 可以换成其它的吗?