帮很大的忙英语怎么说

To help a lot is to be of great help. This phrase comes from the idea that when someone does something to assist or benefit another person, they are providing them with help. Here are some example sentences in English and Chinese:
Thank you for being of great help to me. 谢谢你帮了我很大的忙。
I am grateful for your assistance. 我很感激你的帮助。
Your support has been invaluable. 你的支持对我来说非常宝贵。