关于英语名

可以把
应该可以

可以.关键看你用得标准不标准,最好请教一下专业人士.

可以是可以
但我还是觉得正宗的英语名更地道

sure

形容词和一些名词的合成词应该也可以吧。

it will be weird for you to have an adjective as your english name.
you don't want somebody to address you as Mr. Black Chen when you go overseas right? people will laugh at you. Don't do it if you don't want to be embarrassed