lend (someone) a hand
to help someone do something, especially something that involves physical effort.
Could you lend me a hand with these books?
He's always willing to lend a hand in the kitchen.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。