英语感谢信21篇 Dear xxxxxx ,I am writing to extend my sincere gratitude for xxxxxx(感谢的原因). If it had not been for your assistance in xxxxxx(对方给予的具体帮助), I fear that I would have been xxxxxx(没有对方帮助时的后果).Every one agrees that it was you who xxxxxx(给出细节).Agai