however
- adv.然而;不过;仍然;无论如何;不管怎样;(与形容词或副词连用)无论到什么程度，不管多么
- conj.不管用什么方法;虽然
how 怎样 + ever 曾经
howeveradv.
（与形容词或副词连用）无论到什么程度，不管多么
used with an adjective or adverb to mean ‘to whatever degree’
He wanted to take no risks, however small.
他多小的风险也不想冒。
She has the window open, however cold it is outside.
不管外面多冷她都开着窗户。
However carefully I explained, she still didn't understand.
无论我解释得多么仔细，她还是没弄懂。
How ever did you get here so quickly?
不管怎样；无论如何
in whatever way
However you look at it, it's going to cost a lot.
不管你怎么看，它都要花很多钱。
然而；不过；仍然
used to introduce a statement that contrasts with sth that has just been said
He was feeling bad. He went to work, however, and tried to concentrate.
他感觉不舒服。但他仍然去上班，并且努力集中精神工作。
We thought the figures were correct. However, we have now discovered some errors.
我们原以为这些数据正确。不过我们现在发现了一些错误。
however
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1
ADV 然而;不过;仍然
You use however when you are adding a comment which is surprising or which contrasts with what has just been said.This was not an easy decision. It is, however, a decision that we feel is dictated by our duty...
这很难抉择。不过，我们觉得自己有义务作出决定。
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2
ADV （后接形容词或副词用于强调）不管怎样，无论多么
You use however before an adjective or adverb to emphasize that the degree or extent of something cannot change a situation.You should always strive to achieve more, however well you have done before...
无论之前取得何等辉煌的成就，都应该不断努力进取。
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3
CONJ-SUBORD 不管用什么方式;无论如何
You use however when you want to say that it makes no difference how something is done.However we adopt healthcare reform, it isn't going to save major amounts of money...
不管我们采取何种医疗改革措施，都省不下太多钱。
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4
ADV …左右;…上下
You use however in expressions such as or however long it takes and or however many there were to indicate that the figure you have just mentioned may not be accurate.The 20,000 or however many who come to watch would love to be out on the pitch...
约两万名来看比赛的观众都希望能身处球场之上。
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5
QUEST 究竟怎样，到底如何（用于强调地询问令人吃惊的事情;一些人认为此用法不正确，用how ever较为妥当）
You can use however to ask in an emphatic way how something has happened which you are very surprised about. Some speakers of English think that this form is incorrect and prefer to use 'how ever'.However did you find this place in such weather?
你到底是怎样在这样的天气里找到这个地方的？
adv
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1
- despite anything to the contrary (usually following a concession)
- although I'm a little afraid, however I'd like to try it
- while we disliked each other, nevertheless we agreed
- he was a stern yet fair master
- granted that it is dangerous, all the same I still want to go
- Synonym: nevertheless withal still yet all the same even so nonetheless notwithstanding
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2
- in whatever way or manner
- Victory, however it was brought about, was sweet
- however he did it, it was very clever
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3
- to whatever degree or extent
- The results, however general, are important
- they have begun, however reluctantly, to acknowledge the legitimacy of some of the opposition's concerns
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4
- by contrast;on the other hand;the second, however, took hours"
- the first part was eas
数据来源：WordNet
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Suspicion and jealousy , however ill-founded , can poison a marriage .
怀疑和忌妒，不管多么站不住脚，都可能毒害婚姻。
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I 'd like you and I to be friends ... However brief .
我希望我们能成为朋友…不管多么短暂。
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He wanted to take no risks , however small .
他多小的风险也不想冒。
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Many problems , however , escape detection .
然而许多问题却未被察觉。
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There would be some benefit , however indirect , to the state .
国家会得到一些利益，不管有多少。
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However you look at it , it 's going to cost a lot .
不管你怎么看，它都要花很多钱。
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She has the window open , however cold it is outside .
不管外面多冷她都开着窗户。
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There was one respect , however , in which they differed .
然而，他们在一点上有分歧。
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However much you try to dress it up , office work is not glamorous .
无论你怎样夸饰，办公室工作都不令人向往。
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They do , however , share a mutual interest in design
不过他们确实都对设计感兴趣。
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However much it hurt , he could do it .
无论有多痛，他都能做到。
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However did you find this place in such weather ?
你到底是怎样在这样的天气里找到这个地方的？
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They were not finished , however , not by any means .
不过，他们并没有结束，绝对没有。
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Wait 30 to 60 minutes or however long it takes .
等30到60分钟左右。
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Starting a new business , however small , is a time-consuming exercise .
创办一家新企业，不管多小，都是件旷日持久的事。
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However , the main core of the company performed outstandingly .
然而，该公司的主营业务却表现出色。
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However hard she tried , nothing seemed to work
不管她怎么努力，好像都无济于事。
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The mechanics of the job , however , have changed little since then .
不过，工作流程从那以后就几乎没有任何变化。
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When you come down to it , however , the basic problems of life have not changed
然而，归根结底，生活中一些基本的问题还是没有变。
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On one issue , however , she was immovable .
但是在一个问题上她态度坚决。
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You should always strive to achieve more , however well you have done before
无论之前取得何等辉煌的成就，都应该不断努力进取。
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A further obstacle has presented itself , however .
然而，突然又出现了一个障碍。
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The deal with Chelsea may not , however , be dead .
不过，与切尔西的交易或许还有戏。
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For the time being , however , immunotherapy is still in its experimental stages
但免疫疗法目前仍处于实验阶段。
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Higher sales have not helped profits , however .
然而，销售量的增加并没有推动利润。
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For the moment , however , the government is happy to live with it .
不过目前政府对此还乐于容忍。
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Some of the food crops failed . However , the cotton did quite well
有些粮食作物歉收。但棉花的收成仍相当不错。
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Wear your hair however you want .
你想弄什么发型自己看着办。
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There were , however , a number of crucial flaws in his monetary theory
但是，他的货币理论中存在若干关键性错误。
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Not every judge , however , has the ability to explain the law in simple terms
然而，不是每个法官都能用简单的语言来解释法律。