but 和however 有什么区别?如句中：I've come to the conclusion

but 和however 有什么区别?如句中：I've come to the conclusion

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but 口语常用词,语气较强,泛指与前述情况相反.however 表转折关系,语气稍弱于but,连接性也弱一些,因而常作插入语.应该可以换吧.======以下答案可供参考======供参考答案1:1、but 副词This took him but a few minutes. 这仅仅花他几分钟时间。 She is but a child. 她不过是一个孩子罢了。 I can but hear. 我只能听听而已。 If I could but see him! 我要是能见一见他就好了! I can but try it. 我好歹试试看。 He left but an hour ago. 他一小时以前才离开。 It happened but yesterday. 这件事昨天刚发生。 B- I did go there. 然而我确实是去过那里了。h2/owever（程度副词）可位于形容词／副词之前：You couldn’t earn much，however hard you worked 无论你干得多卖力，你都挣不了多少钱。however（连词）通常意为“但是”，可位于它所引导的从句之前或之后，或位于第一个词或短语之后：I’ll offer it to Tom．However，he may not want it．／He may not want it however．／Tom，however，may not want it．／If，however，he doesn’t want it... 我将提出把这个给汤姆，然而他可能不要它。／而汤姆可能不要它。／然而，万一汤姆不要它的话……但提到两句意义相反的话时， however意为“但是／仍然／同样”：They hadn’t trained hard，but／however/nevertheless/all the same they won however／nevertheless／all the same． 他们并没有刻苦训练，但／无论如何／仍然／同样获胜了。供参考答案2:however 不用另起新句哦...quite sincere about it; however, they don't know...用分号这样连接也可以 =]另外,补充一下but在正式的essay里是不可以用在句首的,跟because一样.我在加拿大11年..不会错啦..供参考答案3:不可以换！供参考答案4:1. however作副词用时，表示“然而；但是”，可以位于句首、句中和句末；位于句首时，要用逗号与句子其它部分隔开；位于句中时，其前后都要用逗号；位于句末时其前用逗号分开。 例如: She felt ill. She went to work, however, and tried to concentrate. 她病了。然而她照旧去上班，并且尽力集中精神工作。 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。 2. however与but 两者都做“但是，然而”讲，而且都引出并列句。从语义上看，but所表示的是非常明显的对比，转折的意味较however要强。从语序上看，but总是位于所引出的分句之首，而however却可位于句首、句中和句末，同时从标点符号上看，but之后一般不得使用逗号，而however则必须用逗号与句子其它部分分开。例如： I thought those figures were correct. However, I have recently heard they were not. 我原以为那些数字正确无误，不过我最近听说并不正确。 3. however的其它用法： however可以作连词(conj.)，表示“无论以何种方式，不管怎样”，引导让步状语从句。例如： You can travel however you like.你可以随心所欲地去旅行。 However I approached the problem, I couldn’t find a solution. 这一问题我不管怎样都无法解决。

我明天再问问老师，叫他解释下这个问题