以下是一份常见的英语感恩节贺卡内容：

Dear [Recipient's Name],

Thanksgiving is a time to reflect on and appreciate all the good things in our lives. I am grateful for the memories we have shared, the laughter we have enjoyed, and the moments of comfort and strength you have given me.

As we gather around the table with family and friends, let us remember the importance of love, kindness, and gratitude. May this Thanksgiving bring us joy, warmth, and abundance.

With heartfelt thanks,

[Your Name]

这仅是一份示例，你可以根据你与收信人的关系和情感，自由地修改和个性化这份贺卡内容，以传达你的真挚感恩之情。