核心差别
plead 强调plead 是一个动词，beg 则侧重beg 指以谦卑或急切的方式请求或乞求
使用场景对比
| 对比方面 | plead | beg |
|---|---|---|
| 核心含义 | plead 是一个动词，指在法庭上为某人辩护，或恳切地请求某事，常带有情感或法律色彩。 | beg 指以谦卑或急切的方式请求或乞求，常用于正式或非正式场合，表达强烈的需求或恳求。 |
| 词性 | 动词 | 动词 |
| 使用语域 | plead 常用于 plead with someone to do something（恳求某人做某事）或 plead guilty/not guilty（认罪/不认罪）的句型中，前者强调恳求，后者是法律术语。 | beg 常用于 beg sb. to do sth. 句型，表示请求某人做某事；也可直接接宾语，如 beg forgiveness。 |
对比例句
plead
She pleaded with her parents to let her go to the party.
她恳求父母让她去参加派对。
plead
He pleaded for more time to finish the project.
他恳求更多时间来完成这个项目。
beg
He had to beg his friend to lend him some money for the bus fare.
他不得不请求朋友借他一些钱付公交车费。
beg
The child begged her mother for one more cookie before bedtime.
孩子睡前恳求妈妈再给一块饼干。
常见误用提醒
使用 plead：I plead him to help me. → I pleaded with him to help me. (错误在于缺少介词 with；plead 作恳求时，常用 plead with someone to do something 结构，表示向某人恳求。)
使用 plead：She plead guilty for the crime. → She pleaded guilty to the crime. (错误在于介词使用不当；plead guilty 后应接 to 表示对某事认罪，而不是 for，for 通常用于恳求原因。)
使用 beg：I beg you helping me. → I beg you to help me. (错误：beg 后接宾语和动词时，应用不定式 to do，而不是动词原形或动名词。正确用法是 beg sb. to do sth.。)