adv.然而；无论如何；不管多么
conj.不管怎样
His first response was to say no. Later, however, he changed his mind. 他最初的反应是不同意。可是后来他改变了主意。
He will never succeed however hard he tries. 不论他怎样努力,都不会获得成功。
You won't move that stone, however strong you are. 不管你力气多大,也休想搬动那块石头。
用作连词 (conj.)However sly a fox may be, it is no match for a good hunter. 狐狸再狡猾也架不住好猎手。
however后可直接加形容词/副词，再加主语，加谓语动词。在该结构句中，however表示“无论……，不管……”。 However rich people,they always want more.无论人们有多富裕，他们总还是想要更多。
however属于副词，与whatever不同，不可作动词的宾语。whatever可作代词，因此可作动词的宾语，如whatever she say；
however与but不可并存，两者只可选其中一个；
how ever同how ... ever的用法：how ever是how的疑问句中的一种强调语气的格式，常见于口语中。how ... ever表示“曾经如何……”，两个词都有其本身的意思。 How ever can it have happened? This should have been how they ever got on.
adv.(副词)however 通常引导一个让步状语从句,从句中的形容词或副词必须紧接其后。however多插在句中,有时也放在句首或句尾,但都应紧跟在进行对比的词或短语之后,用逗号将其与其他词分开。however是how的强调形式,通常含有惊讶、质问、气恼或感叹等意味。however可与but连用。
