关联词是连接句子、段落以及文章的重要工具，常见的关联词有很多，如and、but、or、so、however、therefore、meanwhile、moreover、nevertheless、nonetheless、furthermore、likewise、in addition、consequently、as a result等等。在写作中，正确使用这些关联词可以使文章更加流畅、有条理、有逻辑性。下面就来介绍15个常见关联词及其用法。

1. And：表示并列关系，连接两个同等重要的句子或词组。例如：I like swimming and hiking.

2. But：表示转折关系，连接两个意义相反的句子或词组。例如：She is smart but lazy.

3. Or：表示选择关系，连接两个选项中的一个。例如：We can go to the beach or the park.

4. So：表示因果关系，连接前后两个句子，表示结果。例如：It was raining, so I stayed at home.

5. However：表示转折关系，连接两个意义相反的句子，前面是肯定的，后面是否定的。例如：He is a good student, however, he never does his homework.

6. Therefore：表示因果关系，连接前后两个句子，表示结果。例如：He failed the test, therefore he has to retake it.

7. Meanwhile：表示时间关系，连接两个同时发生的事件。例如：She was cooking dinner meanwhile her husband was watching TV.

8. Moreover：表示增加关系，连接两个同类的句子，表示额外的信息。例如：He is smart, moreover, he is also hardworking.

9. Nevertheless：表示转折关系，连接两个意义相反的句子，前面是肯定的，后面是否定的。例如：He is not very tall, nevertheless, he is a great basketball player.

10. Nonetheless：表示转折关系，连接两个意义相反的句子，前面是肯定的，后面是否定的。例如：She is very busy, nonetheless, she always finds time to exercise.

11. Furthermore：表示增加关系，连接两个同类的句子，表示额外的信息。例如：The company is profitable, furthermore, it is expanding to new markets.

12. Likewise：表示相似关系，连接两个相似的句子。例如：She likes to read, likewise, her sister also enjoys reading.

13. In addition：表示增加关系，连接两个同类的句子，表示额外的信息。例如：The company is hiring new employees, in addition, it is offering more benefits.

14. Consequently：表示因果关系，连接前后两个句子，表示结果。例如：She missed her flight, consequently, she had to stay in a hotel.

15. As a result：表示因果关系，连接前后两个句子，表示结果。例如：He didn't study for the exam, as a result, he failed.