help sb. over

例句：

1. 1. He helped me to find the lost keys.
   他帮我找到了丢失的钥匙。
2. 2. She offered her help to the old man.
   她向老人提供帮助。
3. 3. The teacher helped us understand the difficult concept.
   老师帮助我们理解了难以理解的概念。