你根本不懂英文

这估计是国人的句子，是骂人的说法，后半句直译老外是听不明白的，可以翻译成：你根本不懂英语，翻译个鸟呀！

O(∩_∩)O~这句话的意思是：你根本不懂英语。你翻译你奶奶个腿。我只是照原文翻译而来，只能保证翻译无误。

You don't understand English。 You translate Your grandmother's leg你不懂英文，你翻译你的祖母的腿

i don't understand我不明白；我不懂；我全不懂例句1.I don't understand exactly what you are trying to say.我不很了解你想说什么。2.I don't understand in the least what the author is trying to say.我毫不明白这位作者在说些什么。3.I don't understand how any normal day of my life can turn out to be so potentially heinous.我不明白我正常生活的任何一天原来可以潜藏著邪恶。4."I don't understand what you mean, " he shook his head.“我不明白你的意思，”它摇摇头。5.I'm an old man compared to you and I don't understand either.跟你比我算是老人了我也不明白6.I cannot help you if I don't understand what you are talking about.你不解释清楚，我就无法帮你

I don't understand我不明白例句:1.I don't understand, how did you know this would happen? 我不明白，你是怎么知道这些事情要发生的？

don't understand是泛泛而言,多为涉及某方面知识上,学术上的不懂.