考研英语高频考点however用法解析
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.
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。
这个例句就等于however的第一个意思adding a comment which is surprising，添加令人惊讶的信息，棉花的收成相当不错是令人惊讶的。
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。
这个例句就等于however的第二个意思which contrasts with what has just been said，前面说抉择很难，后面说必须作出决定。
however在近20年真题中考察了八次，接下来我们看一下几道历年真题句子
2002年英一完型填空
It is generally recognized, （however） , that the introduction of the computer in the early 20th century, followed by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately apparent.
虽然它对媒体并没有立竿见影的影响，然而，人们普遍认识到二十世纪初期计算机的出现，及随后六十年代集成电路的发明，在极大程度上改变了这一进程。
这道题考察的是however第二个用法，即adding a comment which contrasts with what has just been said，前面说没有影响后面说极大程度上改变了这一进程.
2008年英一完型填空
These facts, however, have previously been thought unrelated.
然而，这些事实之前被认为毫不相关。
这句话说明之前被认为不相关，而现在相关，使用的也是however表前后内容相反的用法，即adding a comment which contrasts with what has just been said。
2010年英一完型填空
However, a comparison with data for weeks when there was no experimentation showed that output always went upon Monday.
但是，和没有进行试验的几周的数据进行对比发现，周一的产出总是会增加。
这道题考察的是however的第一个用法，即adding a comment which is surprising
周一的产出总是会增加是一个令人惊讶的发现。
2.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。
重点掌握副词用法