Formal:
Dear xxx, / Dear Sir or Madam,
I am … and / My name is … and
I am writing this letter to …./concerning …
Body 1
Body 2
I would be very grateful if you could …
Yours sincerely. (知道對方名字) / Yours faithfully. (不知道對方名字) Informal:
Dear XXX,
I hope you and your family well, and I’m sorry I haven’t been in touch recently. I’m writing now to let you know
about …
Body
Lots of love,
Name