but,however,still,neverthless,yet这是几个词义很近的同义词，都表示转折或让步。
but 用来引出微肢明橡弱的相反的意见，是口语常用词。
Nearly everybody enters for‘The Nicest Garden Competition’each year,but Joe wins every time.
年年几乎大家都报名参加“最佳花园竞赛”，但每次获胜的都是乔。
…but more often than not,the greater part of the journey is spent on narrow,bumpy roads which are crowded with traffic.
但是一路之上，大部分的时间往往会在狭窄、坎坷不平而且车辆拥挤的道路上度过……(more often than not=very frequently[英语惯用法])
It's a pleasant dream but everything depends on"if".
这倒是个非常令人愉快的梦想，但一切都取决于“如果”。
Sally was amused,but I was very embarrassed.
萨莉很开心，但我却很尴尬。
however 比 but 的词义还要弱些，并不直接引出相反的意见，因此常用作插入语
You will be lucky if he lets you go without a ticket.However,this does not always happen.
他如果不给你一个违章通知单就放你走，你就是运气好。不过，这种事也并不总是发生的。
The most surprising thing about it,however,is that it can land anywhere…
不过，关于这架飞机的最使人吃惊的事情是，它可以在任何地方着路……
still 还，还是
It is ture that winter is over;still,it is almost as cold.
冬天已经过去了，这是事实，但天气还是那么冷。
He treated you badly;still,he is your brother and you ought to help him.
他槐培过去待你很坏，但是他还是你的哥哥，那么你应该历旁帮助他。
neverthless 的含义是：即使作出完全的让步，也没有任何影响，或者说也不是决定因素。
There was no news;neverthless,she went on hoping.
一点消息也没有，但是她继续抱着希望。
To be sure,it is no longer winter;neverthless, it is quite cold.
现在固然已不是冬天了，可是天气还是相当冷。
yet 的含义是：即使作出极端的让步，也不会发生期待的结果。
He worked hard, yet ,he failed.
他干得很卖力，然而他失败了。
It is well on in May,yet,it is almost as cold as midwinter.
现在进入5月分已经好长时间了，然而天气还象仲冬一样冷。
