1. He tried to finish the project alone and overreached himself.
他试图独自完成这个项目，结果超出了自己的能力范围。

2. Investors who overreach themselves often face serious losses.
那些过度冒险的投资者往往会面临严重损失。

3. She overreached herself by taking on too many responsibilities.
她承担了太多责任，结果力不从心。

A: Are you sure you can handle all these tasks alone?
A：你确定自己能独自完成这些任务吗？

B: I think I might overreach myself if I try.
B：我觉得如果我尝试的话，可能会超出自己的能力范围。

1) 尝试做超出自己能力的事情

2) 表示过度自信导致可能失败

3) 可用于职业、学习、财务等情境

1. 表示自信过度，承担超出能力范围的任务

e.g. He overreached himself by managing three departments alone.
他独自管理三个部门，结果力不从心。

2. 指野心或计划超过现实能力

e.g. The company's CEO overreached himself with an aggressive expansion.
公司CEO因激进扩张而超出自身能力。

idiom

1. To attempt to do something that exceeds one's abilities or power, often resulting in failure or difficulties.

Synonym: overextend oneself, take on too much