I am writing to extend my sincere gratitude for... 谨以此信表达我对……的真诚感谢。"本句型是典型的感谢信的开头。其中，sincere意为“真诚的;诚挚的”。如:Please give my sincere regards to all the members of your family.请向您全家转达我真挚的问候。gratitude意为“感谢的心情”。如:We owe you a debt of gratitude for your help.承蒙帮助，感激不尽。本句型中，介词for后面应该接名词或者名词性短语。如:your recommendations(您的推荐)，your attendance in the conference Monday(您出席周一的会议)等。句型拓展1. I am writing to express my thanks for your presence on my birthday party.
谨以此信表达我对您参加我生日聚会的感谢。
2. I am writing to show my sincere appreciation for your presence on my birthday party.谨以此信表达我对您参加我生日聚会的真诚感谢。 长按识别二维码可关注该微信公众平台