Is there any difference between the expressions different from, different than, and different to? Is one of the three ‘more correct’ than the others?
Diffrent from，different than，和differnt to这三种表达之间有没有差别呢？是不是其中一种表达比其他的＂更正确＂呢？

在英式英语和美式英语中，different from都是这三种表达中最常见的：

We want to demonstrate that this government is different from previous governments. (British English)
我们想要阐述这个政府和之前的政府是不同的。（英式英语）

This part is totally different from anything else that he's done. (American English)
这个部分和他完成的其他部分是完全不同的。（美式英语）

Different than 主要在美式英语中使用：

Teenagers certainly want to look different than their parents.
青少年必定想要看起来和他们的父母不同。

与美式英语相比，在英式英语中Differnet to更常见：

In this respect the Royal Academy is no different to any other major museum.
在这个方面，皇家艺术学院和其他主要的博物馆相比并无区别。

Some people criticize different than as incorrect but there’s no real justification for this view. There’s little difference in sense between the three expressions, and all of them are used by respected writers.
有人认为dfferent than是不正确的表达，但这种观点并没有得到认证。这三种表达基本没有差别，并且都被知名的作家使用过。