but, however 的用法 ,有时候弄不清楚.知道表示转折的,但是在句子中用的时候,具体的位置情况,不清楚

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but, however 的用法 ,有时候弄不清楚.知道表示转折的,但是在句子中用的时候,具体的位置情况,不清楚
but, however 的用法 ,有时候弄不清楚.知道表示转折的,但是在句子中用的时候,具体的位置情况,不清楚

but, however 的用法 ,有时候弄不清楚.知道表示转折的,但是在句子中用的时候,具体的位置情况,不清楚
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辨析 however和 but
二者都意为“可是,但是”;
but是并列名词,连接两个并列分句,上下二句在总的意义上构成了对比.
I really don't like cheese,but I will try just a little this time.我实在是不喜欢吃奶酪,但是这次我要尝一点.
however不能直接连接两个分句,必须另起新句,并用逗号隔开.
It was raining hard.However,we went out to look for the boy.雨下得很大,不过我们还是出去寻找那个孩子

简单地说,一个逗号可以帮你区分两词。
but后必须连接一个句子,
however后必须要加一个逗号,才能连接句子。
有些词之间是有技巧可以分辨的。
希望能够对你有所帮助。

表语气转折的单字有
but,however, nevertheless, notwithstanding, although, though等
but跟however这两个字除了文法不同外,最重要的还是用法和语气上的分别。
在文法上
But 是一个连接词,用来连接两句完整句子的字;
但 however 只是个 副词,不能用来连接句子。而用 however 时...

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表语气转折的单字有
but,however, nevertheless, notwithstanding, although, though等
but跟however这两个字除了文法不同外,最重要的还是用法和语气上的分别。
在文法上
But 是一个连接词,用来连接两句完整句子的字;
但 however 只是个 副词,不能用来连接句子。而用 however 时要用 comma(逗号) 把它从句子其他部份分开。
例: I love her, but she doesn't love me.
这里如果换上 however 就必须是这样:
I love her. However, she doesn't love me.
如果两句句子意思紧接,你想用 however 却不想把它分开两句,可以用分号 ";":
I love her; however, she doesn't love me.
在用法上
However 可用於句子中间,用作加强语气的 interruption(休止)。
例: (i) Abortion is outlawed in many European countries. Illegal abortion, however, is thriving.
(ii) It is clear, however, that...
(iii) Many people welcome the newly introduced smoke ban; restaurants owners, however, were pissed.
(iv) Most people believe that abc. Researches have shown, however, that xyz.
那麼 however 要放在句子甚麼位置? 理论上句子里任何位置都可以。规则是,放在你想强调的部份前面。
在例句 (i) 和 (iii),最明显的地方是动词 "is thriving" 和 "were pissed",就在前面加上 however。这样,对比的感觉会特别强烈。
However 最常见的位置是在修饰整句的 adverb 后:"I kept asking her out and she kept refusing. At last (adverb), however, she agreed to go out with me."。
另外一个常见的位置是句子主语 (subject) 和动词中间,像例句 (i) 和 (iii)。
最后,如果句子有 that 的话,可以放在 that 之前:"It is clear, however, that...";"He said, however, that..."。
在语气上
一般谈话通常会用 but,而 however 通常只用於书面或较正式的对话。
还有,however 在一个句子里通常是语气上的重点,会把读者对这句句子的注意力都给抢了过来;相反,but 可以是个可轻轻带过的字。

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关于这个问题,请参考《中学英语高频词详解词典》(金盾出版社):
……
however 表示转折,尤其用于谈及一个既成事实时,表示转折,其意为“可是”“仍然”等。可放在句首、句中或句末,通常用逗号与句子其他成分隔开。如:
My father, however, did not agree. 但是,我父亲不同意。
My room is small; however, i...

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关于这个问题,请参考《中学英语高频词详解词典》(金盾出版社):
……
however 表示转折,尤其用于谈及一个既成事实时,表示转折,其意为“可是”“仍然”等。可放在句首、句中或句末,通常用逗号与句子其他成分隔开。如:
My father, however, did not agree. 但是,我父亲不同意。
My room is small; however, it’s comfortable. 我的房间很小,但却很舒服。
He said that it was so; he was mistaken, however. 他说情况如此,可是他错了。
注意,however不能像 but(但是)那样直接连接两个句子(注意正句中的标点符号)。如:
我们都已尽了最大的努力,不过我们还是输了。
误:We all tried our best, however we lost the game.
正:We all tried our best, but we lost the game.
正:We all tried our best; however, we lost the game.
正:We all tried our best. However, we lost the game.
(3) 表示惊奇或强调,相当于how ever的用法,其意为“究竟怎样,到底以什么方式”。如:
However did you get here without a car? 没有汽车你究竟是怎样来的呢?
However does he manage to write music when he is so deaf? 他聋成这个样子,究竟是怎样从事作曲的呢?

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