however=no matter how后面接形容词或者副词+主谓，引导的是让步状语从句
例如：However hard he works,he feels happy.
how+形容词或者副词+主谓，构成感叹句
How hard he works!
How fine (a day) it is today!
亲：祝你学习进步，每天都开心V_V！
望采纳，thx!
however=no matter how
意思都是 无论xxx
比如however busy l am=no matter how busy l am
而单独的how意思是 怎么样，到何种地步。比如how are you，how busy you are。
however - 不管怎么样
how - 怎样
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ号：24596024