表示同不同意别人的意见，通常用单词 agree，或是非正式的 buy，今天又多了一个比较委婉的表示不同意别人所说的习语 beg to differ，可以意为“恕难苟同，斗胆唱反调”，寓意：
to politely refuse something
礼貌地拒绝某事
to ask for pardon by refusing something
通过拒绝某事来请求原谅
to refute
驳斥
例如：
The argument was quite wonderful in his opinion but I beg to differ. I never enjoy political debates.
他认为这场辩论相当精彩，但恕难苟同。我从不喜欢政治辩论。
I beg to differ to your substandard taste in clothes.
我恕难苟同你对衣服不合格的品味。
解析：clothes 是只会以复数形式存在的不可数名词，说它是不可数名词是因为不能用具体的数字来形容数量，比如不能说 two clothes，但作主语时，谓语用复数。
He is so arrogant that if someone were to beg to differ to his opinions, he could just never take it.
他太傲慢了，如果有人斗胆反对他的意见，他就从来不会接受。
解析：so … that … 引导目的状语从句，意为“如此……以致……”。此句中的 were 是 be 动词的虚拟语气，表示不真实的事或是说话人渴望或想象的事。
I teach this in class every semester and yet I am in search for the student who will beg to differ to my research. That is the day when I would love to have an academic debate.
我每学期都在课堂上教这个，但我在寻找一个对我的研究持不同意见的学生。那是我很想进行学术辩论的一天。
解析：关系副词 when 引导的定语从句，代替先行词 the day，并在从句中作状语。
I always enjoy his company and feel sorry that you beg to differ.
我总是喜欢和他在一起，很抱歉你不同意。
Larry Smith is in favour of setup a new production unit of mobiles at Glasgow, but the managing director beg to differ.
拉里·史密斯赞成在格拉斯哥建立一个新的手机生产部门，但总经理对此表示异议。
以后若表示跟别人的意见不一致，就可以简单地说：I beg to differ.
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