在英语中，四个常见的关联词词组及其用法如下：
1. However, Nevertheless, Nonetheless：这些词组用于引出与前面内容相对立的信息。
- However：表示转折，强调对比。
- 例句：She was tired, however, she continued to work.
- Nevertheless：比however更强调转折，通常放在句首。
- 例句：Nevertheless, she achieved excellent results.
- Nonetheless：与nevertheless用法相似，但语气稍微缓和。
- 例句：He was disappointed; nonetheless, he remained optimistic.
2. Furthermore, Moreover, In addition：这些词组用于引出补充或进一步的信息。
- Furthermore：强调进一步的补充，通常用于较正式的写作。
- 例句：The project is ambitious; furthermore, it is achievable.
- Moreover：与furthermore类似，但更常用在口语中。
- 例句：He is a good speaker; moreover, he is knowledgeable.
- In addition：通常用于列举额外的事实或观点。
- 例句：In addition to English, he speaks French fluently.
3. Therefore, Thus, Hence：这些词组用于引出结论或结果。
- Therefore：表示直接的结果或结论。
- 例句：He studied hard; therefore, he passed the exam.
- Thus：比therefore更正式，通常用于正式的写作。
- 例句：The company invested in new technology; thus, production increased.
- Hence：与thus类似，但更正式，通常用于较长的句子或段落。
- 例句：The policy was implemented; hence, the situation improved.
4. In contrast, On the other hand, Conversely：这些词组用于引出与前面内容相对立的观点或事实。
- In contrast：强调两者之间的明显差异。
- 例句：In contrast to the old model, the new one is more efficient.
- On the other hand：用于引出与前面观点相对立的观点。
- 例句：She is intelligent; on the other hand, she is not very disciplined.
- Conversely：通常用于正式的写作，强调相反的情况。
- 例句：If you increase the temperature, the reaction will slow down; conversely, if you decrease it, the reaction will speed up.
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