However的用法主要有以下两点：
（一）用作连接副词,相当于no matter how,引导让步状语从句,意思是“不管怎样……”“无论如何……”,具体结构有以下两种：
1．however+形容词+主语+系动词,例：
However rich people are,they always seem anxious to take more money.
无论人们有多富裕,他们似乎总是渴望挣到更多的钱.
2．however+副词+主语+谓语,例：
However fast he runs,he can’t catch up with us.无论他跑得多快也不能赶上我们.
（二）用作连词,引导让步状语从句,意思是“怎么样都行”.例：
In one’s own home one can acts however he wishes.在自己家里一个人想干什么都行.
例题:1．（’99NMET第22小题）We’ll have to finish the job,_______.
A．long it takes however B．it takes however long
C．long however it takes D．however long it takes
(答案是D)