but和however的区别,but和however的区别

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。

　　but 与 however的用法区别 　　两者均可表示转折或对比，意为“但是”、“可是”、“然而”等，但有区别： 表示转折时，but 是连词。 如： He is young but very experienced. 他虽年轻，但经验很丰富。He has three daughters but no sons. 他有3 个女儿，但没有儿子。 He likes sports, but his wife likes music. 他喜欢运动，而他妻子则喜欢音乐。 however 表示“然而”、“可是”时，有的词书认为它是连词，有的词书认为它是副词。之所以将其视为副词，也许是因为像许多副词一样不仅能位于句首，而且能位于句中(注意前后使用逗号)，甚至句末 (注意其前也用逗号)。 如： Later, however, he changed his mind. 可是他后来改变了主意。 He hasn’t arrived. He may, however, come later. 他还没有到，不过他等会儿可能会来。 He said that it was so; he was mistaken, however. 他说情况如此，可是他错了。 注：以上各例中的 however 不能换成 but，但可用 but 来改写。如： He said that it was so, but he was mistaken. 他说情况如此，可他错了。 当连接两个句子时，其前通常应用分号，或另起新句。 如： It’s raining hard; however, I think we should go out. / It’s raining hard. However, I think we should go out. 雨下得很大，但我想我们还得出去。 注：上例中的 however 不能换成 but，但可用 but 来改写 (注意所用标点的变化)。 如： 　　It’s raining hard, but I think we should go out.

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；位于句末时, 其前用逗号分开。 【例句】：She felt ill. She went to work, however, and tried to concentrate. 【释义】：她病了。然而她照旧去上班，并且尽力集中精神工作。 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。 【例句】：His first response was to say no. Later, however, he changed his mind. 【释义】：他最初的反应是不同意，可是后来他改变了主意。 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。 【例句】：I thought those figures were correct. However, I have recently heard they were not. 【释义】：我原以为那些数字正确无误，不过我最近听说并不正确。 【双语例句】： 1、You can travel however you like. 【释义】：你可以随心所欲地去旅行。 2、However I approached the problem, I couldn’t find a solution. 【释义】：这一问题我不管怎样都无法解决。 3、Learning the guitar isn't difficult， but you will have to practise. 【释义】：学弹吉他并不难，但是你得练习。 4、However， we need not do that now. 【释义】：可是，我们现在不需要做那个。 5、 His friends， however， had other ideas. 【释义】：然而他的朋友们却另有见解。

but 和however 都表示转折，但是，然而。最明显的区别就是however 是单独使用的，文中出现在一句话的结尾，一段话的开始，有逗号隔开。 比较：He used to be a good driver, however,he had a traffic accident yesterday. He used to be a good driver，but he had a traffic accident yesterday. He used to be a good driver but he had a traffic accident yesterday. 另外but 还表示除.....之外，常用结构have no choice but to do除了....之外别无选择 but 还可以直接接副词。But now, I have no choice but to forget out of my willingness. 可如今，我只能逞强自己选择遗忘。而however不可以。 however除了表示转折以外，还可接其他词，如however much/many/far/often/long等，此时表示无论多...可以相应换成no matter how +much/many/far/often/long 比较People are going to take however much you're willing to give.人永远不会嫌自己拿得多。 In my opinion, parents do not owe their children an inheritance, no matter how much money they have.以我个人的观点，家长们不欠儿女们一份遗产，不论他们多么有钱。 如果还有其他的问题的话，可以去小马过河问问那里专业的英语老师，希望能够帮助到你，谢谢！