✔ 最佳答案
Dear XXX, <--- (your 外國友人's name)
I would like to express my sincere condolences on the recent passing of your mother. I know that your loss has been a terrible blow to you and your family. My heart and thoughts are with you, and I pray you will be comforted in your grief. My family also send their thoughts and prayers to you and your family at this difficult time.
如果你同你外國友人的母親熟悉的話, 你就寫括號裡面的說話--->
[Your mother was a wonderful person. Once when we were together, we ...(講一些你和他媽媽的一些好嘅memories, 一些開心嘅事)..]
I hope that in time your sorrow and pain will be forgotten, and only all the good memories will remain.
Sincerely,
XXX <---- (你個名)
P.S. 寫 Condolence letter 唔需要寫得咁 detail, 簡短直接有慰問就足夠~ =)
參考: 自己..... 10 幾年在加拿大生活所得的經驗