contraposition

逆否命题的翻译技巧，即逆命题和否命题的联结体。速记技巧为：否一必逆，逆必否三（逆否等价，一命题逆否命题互换）

基本翻译：将一个命题的条件和结论互换，再否定条件（去掉条件中肯定的部分），得到逆命题；再否定结论（去掉结论中肯定的部分）得到否命题。

以上内容仅供参考，建议咨询专业人士获取更准确的信息。

逆否词（Contraposition）的英文词源可以追溯到拉丁语“contra”和“negare”，意为“相反”和“否定”。逆否词就是将一个命题与其否定形式进行交换，即如果原命题为真，则其否定形式为假；反之亦然。

变化形式：逆否词本身即为原命题的否定形式，因此没有变化形式。

相关单词：

1. “真”和“假”：逆否词与“真”和“假”相对，前者表示命题的真实性，后者表示其虚假性。

2. “是”和“非”：逆否词与“是”和“非”也有关联，前者表示命题的反面，后者表示其正面。

3. “否定”和“肯定”：逆否词与“否定”和“肯定”是相反的关系，前者表示原命题的反面，后者表示原命题的真实性。

4. “反证法”：逆否词在逻辑推理中常被用于反证法，通过证明原命题的反面为假来间接证明原命题为真。

5. “假言命题”：逆否词与“假言”（如果...那么...）命题相关联，因为假言命题通常包含逆否词的形式。

6. “逆否关系”：逆否词与逆否关系相关联，逆否关系是指两个命题之间的关系，其中一个命题的否定形式与另一个命题互换。

7. “矛盾关系”：逆否词与矛盾关系也有关联，矛盾关系是指两个命题不能同时为真，其中一个为真时另一个必然为假。

8. “互为反面”：逆否词与互为反面也有关联，这两个概念通常一起使用，表示两个概念之间的关系。

9. “互为对立”：逆否词与互为对立也有关联，对立是指两个概念之间的关系，其中一个概念的存在必然导致另一个概念的不存在。

10. “互为矛盾”：逆否词与互为矛盾也有关联，矛盾是指两个概念之间的关系，这两个概念不能同时存在且不能同时为真。

逆否命题

1. The absence of rain leads to drought. (逆命题: drought leads to the absence of rain)

2. If you don"t study hard, you will fail the exam. (逆命题: If you fail the exam, it means you didn"t study hard)

3. The presence of wealth does not necessarily indicate happiness. (逆命题: Happiness does not necessarily exist with wealth)

4. If a person is honest, they will always be trusted. (逆命题: If a person is not trusted, they cannot be honest)

5. A good decision does not always lead to success. (逆命题: If a person fails, it means they made a bad decision)

6. A strong foundation does not guarantee success. (逆命题: If a person succeeds, it means they had a strong foundation)

7. A good reputation does not always lead to happiness. (逆否命题: A bad reputation does not always lead to unhappiness)

逆否命题在逻辑学中非常重要，因为它可以帮助我们更好地理解命题之间的关系，并更好地应用逻辑推理。

英文小作文：

If you want to succeed in life, you need to have a strong foundation of knowledge and skills. However, just having a good foundation is not enough. You also need to make good decisions and take action to achieve your goals. Similarly, having a good reputation is essential for social acceptance and respect, but it does not guarantee happiness or success. On the other hand, failure can be a valuable lesson if you learn from it and use it as motivation to improve yourself. Therefore, the importance of learning from failure and making good decisions cannot be overstated.