think different,但differently是形容词啊?怎么能修饰动词?

请看下面的短语：
1.think different.
2.think differently.
3.think something different.
4.think something that is different.
5.think of something different.
现在人们越来越讨厌使用以‘-ly’结尾的副词,以至人们喜欢选择1式,而不是2式,3式是4式的简略式,但在特殊情况下,宁可用5式.