The writing format of English thank-you letters is: letter head, address in the letter, title, body, conclusion and signature.

The writing of thank-you letter is mainly divided into the following three parts. First of all, you should clearly express your gratitude for each other's help or gift. The main part needs to list the help provided by the other party, explain the role played by the help, or express the love for the gifts received, and how to use and collect them in the future. Finally, we need to express our sincere thanks again and greet each other.

Common sentence patterns in English thank-you letters:

I am writing this letter to thank you.

I am writing this letter to express my gratitude to ….

I want to take this opportunity to express my deep gratitude for your timely help and assistance.

I want to take this opportunity to thank you for your timely help and support.

Thank you again for your kind help.

Thanks again for your help.

I really appreciate your sincere help.

I deeply appreciate your sincere help.

Thank you very much for your kindness and hospitality.

Thank you for your kindness and hospitality.