however，no matter how

However和no matter how同義，都表示“無論如何”的意思，又都引導讓步狀語從句，但它們的修辭意味和使用場合有所不同。

However是比較正式的用語，大都用于書面語，口語中較少使用;no matter how則比較口語化，它的語勢比however重，故常用在強調的場合。請看下面的例句：

The task must be done，however arduous it may be.

無論多么艱難，這個任務一定要完成。

(試比較一般句：The task must be done though it is arduous.)

I’ll take your words，no matter how harsh they may be.

無論語氣多么難聽，我還是聽你的話的。

(試比較一般句：Although your words are harsh，I’ll take them.)

However有時可表達“然而”、“可是”之意，出現于句中或句尾。例：

They said that it was so;they were mistaken，however.

他們說事情就是如此，可是他們錯了。

與之類似區別的詞語很多，例如whatever/no matter what、whenever/no matter when、wherever/no matter where、whichever/no matter which、whoever/no matter who.