In the simplest English, a well-expressed and clearly pronounced "Thank you" will work wonders and will show your
helpmate or who ever that you appreciate what they have done for you or what they have given you. To refresh your memory here
are some of the basic forms of thanks:
Thank
Thank you
Thanks a lot
Thanks very much
Thank you very much
These basic forms are all well-known and are all very obvious.Want to "ring the changes"? Then extend your range with all or some of these:
Thanks awfully
That's very good of you (to help me)
Terribly kind of you (to help me or give me sth. )
Awfully nice of you
And for something a little special?
Can't thank you enough.
How can I ever thank you?
Of course, saying "thanks" is a way of showing our gratitude and so it's quite in order to say:
I'm very grateful to you.
I really am very grateful to you.