however和but的区别及用法.pdf

however 和 but 的区别及用法 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 .