however/whatever的区别：
1、词性的区别。
whatever是代词，在句子中可以扮演名词能够充当的所有成分,例如主语,宾语等，意思是所...的，认可。eg：Whatever he said that day is true.。
however是表转折的连词，只能用来连接两个分句。意思是然而。eg. They promised to tell him the address, however, in the end they cheated him again.
2、在句子中的区别。whatever在句子中做宾语，如whatever you want，无论你想要什么 。 however在句子中做状语，如 however you want it，无论如何你想要它。
3、判断句子完整与否区别。whatever you want的句子少了whatever 必缺少成分，you want句子不完整，缺宾语。 however you want it用的句子少了however还是完整的，you want it，这句话是完整的。
扩展资料：
whatever作连接形容词时，意为"无论什么样的"。应当注意, 此用法的whatever必须同其被修饰的词一起放在从句前引导从句。如: I can do whatever work I can find.我可以做我能找到的任何工作。
however，等同于“but”和“in whatever way”。虽然在前者的情况下“however”必须作为副词存在，但正像下文句中那样，错将其作为连词来使用的例子也时有发生。举例：
1、误： I would like to go to a movie, however I have no money；
2、正：I would like to go to a movie, but I have no money；
3、正：I would like to go to a movie. However, I have no money.
另外，however= in whatever way。