“举例证明”可以用英语表达为 "prove by example" 或 "demonstrate through examples"。以下为具体用法和例句：
1、 Prove by example
例句: "To prove by example that teamwork boosts efficiency, let's analyze how our project succeeded through collaboration."
（为举例证明团队合作能提高效率，我们分析一下项目如何通过协作取得成功。）
2、 Demonstrate through examples
例句: "The teacher demonstrated through examples how complex theories could be applied in real-life scenarios."
（老师通过举例证明，复杂的理论如何应用于实际场景。）
其他相关表达：Illustrate with examples（用例子说明）
Use examples to substantiate（用例子佐证）
根据语境选择最贴切的短语即可。