Thank you for your help.谢谢您的帮助。
对某人的帮助表7K感谢，-可以说Thank you for helping me out with...。
I'm grateful for your help.
It's very nice of you to help me.
It's really thoughtful of you to do that.
Thank you for the invitation.谢谢您的邀请。
这个表达还可以说成Thank you for inviting me.或者Thank you for having me.。让我们看看下面的例句。
Thank you for the invitation to your party.
Thank you for inviting me and my family.
Thank you for having me. The dinner was great.