I beg to differ I don't agree with you.  恕我不能赞同 

例句用法I beg to differ with you on this matter.请允许在这件事上跟您意见分歧。

I beg to differ with you on the subject.在这个问题上，你的意见，我不敢苟同。

I beg to differ with you, Mr Morison.恕我不敢苟同,莫里森先生。

I beg to differ from your opinion.我对阁下的意见不敢苟同。I beg to differ from you on the opinion.恕我对你的看法不敢苟同。