英语中常用的转折连词包括"but"、"however"和"although"。"but"用于表示对比、转折或否定关系，"however"强调句子间的对比和矛盾，常用于正式文体，而"although"表示转折的同时，也带有让步意味。选择合适的连词可以使语言更流畅、精准。
1. but
but是最常见、最基本的表转折连词，表示前后两个句子之间的对比、转折或否定关系。例如：
- I like coffee, but my friend prefers tea.（我喜欢咖啡，但我的朋友更喜欢茶。）
- She is very talented, but she lacks confidence.（她非常有才华，但缺乏自信。）
- The movie was entertaining, but the ending was disappointing.（这部电影很有趣，但结局令人失望。）
2. however
however也是表示转折的连词，但它更强调两个句子之间的对比和矛盾。与but相比，however更常用于正式文体。例如：
- The company's profits have increased significantly. However, this growth may not be sustainable.（公司的利润大幅增长，然而这种增长可能不可持续。）
- She is a hardworking student. However, her grades are not as good as they could be.（她是一个勤奋的学生，然而她的成绩不如可能的好。）
- He is a talented musician. However, he has not yet achieved the success he deserves.（他是一个有才华的音乐家，然而他还没有获得应得的成功。）
3. although
although表示转折的同时，也带有一定的让步意味。它通常用在主句中，后跟一个表达相反或让步的从句。例如：
- Although it was raining, we decided to go for a walk.（尽管下雨了，我们还是决定去散步。）
- She is very busy, although she always finds time to help others.（尽管她很忙，但她总是能找到时间帮助他人。）
- Although he is not very tall, he is a skilled basketball player.（虽然他不是很高，但他是一名技术娴熟的篮球运动员。）
