“Common”这个词，在英语中含义广泛，使用频率极高，因此掌握它的固定搭配对于提高英语表达的准确性和地道性至关重要。本文将深入探讨“common”的一些重要固定搭配，并提供例句，帮助读者更好地理解和运用。

1. Common Knowledge:

这是一个非常常见的表达，意思是“常识”，指大家都知道的事情或者信息。

Example: It’s common knowledge that smoking is bad for your health. (吸烟有害健康是常识。)

Example: The fact that the Earth revolves around the Sun is now common knowledge. (地球绕太阳转现在是常识。)

2. Common Sense:

指的是“常识、理智”，是一种基于实践经验和逻辑推理的判断力。

Example: Use your common sense when dealing with strangers. (和陌生人打交道时要运用你的常识。)

Example: It's just common sense to bring an umbrella when it's raining. (下雨天带伞是理所当然的。)

3. Common Ground:

表示“共同点、共同立场”，指的是双方或多方在观点、利益等方面的一致之处。

Example: Despite their differences, they found common ground on the issue of environmental protection. (尽管他们之间存在差异，但他们在环境保护问题上找到了共同点。)

Example: We need to find some common ground before we can start negotiating. (在开始谈判之前，我们需要找到一些共同立场。)

4. Common Practice:

指的是“普遍做法、惯例”，指在特定领域或人群中普遍存在的行为或习惯。

Example: It is common practice to tip waiters in restaurants in the United States. (在美国，给餐厅服务员小费是一种普遍做法。)

Example: Sharing files via email is a common practice in many offices. (在很多办公室，通过电子邮件共享文件是一种普遍做法。)

5. Common Language:

指的是“通用语言、共同语言”，指的是不同文化背景的人们可以用来交流的语言。

Example: English is now considered a common language for international business. (英语现在被认为是国际商务的通用语言。)

Example: They needed to find a common language to communicate effectively. (他们需要找到一种共同的语言才能有效地沟通。)

6. Common Name:

指的是“俗名、通用名”，指的是动植物、化学物质等在日常生活中常用的名称，区别于学名。

Example: "Ladybug" is the common name for the insect scientifically known as Coccinellidae. ("瓢虫"是昆虫科克星虫的通用名。)

Example: Baking soda is the common name for sodium bicarbonate. (小苏打是碳酸氢钠的俗名。)

7. Common Courtesy:

表示“基本的礼貌、客套”， 指在社会交往中应该遵守的基本礼仪。

Example: It's just common courtesy to say "thank you" when someone helps you. (当别人帮助你时，说“谢谢”是基本的礼貌。)

Example: Showing respect for elders is a sign of common courtesy. (尊重长辈是基本礼貌的体现。)

8. Common Good:

指的是“公共利益、共同福祉”， 指的是整个社会或群体的利益，而非个人的利益。

Example: Politicians should work for the common good, not just for their own interests. (政治家应该为公共利益而努力，而不仅仅是为了他们自己的利益。)

Example: Education is essential for the common good. (教育对于公共利益至关重要。)

9. In Common:

表示“共同地、共有地”， 指的是两个人或多个人拥有相同的特征、兴趣、经历等。

Example: They have a lot in common, like a love of music and travel. (他们有很多共同点，比如热爱音乐和旅行。)

Example: We all have one thing in common: a desire to succeed. (我们都有一个共同点：渴望成功。)

10. Common Error:

指的是“常见错误”，指的是在学习语言、进行计算或处理其他任务时经常出现的错误。

Example: A common error in English is confusing "there," "their," and "they're". (英语中一个常见错误是混淆“there”、“their”和“they're”。)

Example: Programmers should be aware of common errors that can lead to security vulnerabilities. (程序员应该意识到可能导致安全漏洞的常见错误。)

11. Common Cold:

指的是“普通感冒”。

Example: I caught a common cold last week and had to stay in bed. (我上周得了普通感冒，不得不卧床休息。)

12. Common Ancestor:

指的是“共同祖先”。

Example: Biologists believe that humans and chimpanzees share a common ancestor. (生物学家认为人类和黑猩猩拥有共同的祖先。)

理解和掌握这些“common”的固定搭配，能够显著提升你的英语表达能力，使你的语言更加自然流畅，更贴近native speaker的表达习惯。 建议读者在日常学习和工作中，有意识地运用这些固定搭配，从而达到熟练掌握的目的。 学习语言是一个循序渐进的过程，只有不断积累和实践，才能真正掌握语言的精髓。