[参考范文]
Dear Sir,
We are going to have a party at student canteen on June 14th to celebrate our graduation. It is a crucial occasion for all of the class members and, as both a good teacher and a helpful friend, we do hope that you could come over and share our joy.
The party will start at 7 p. m. There also will be talent shows prepared by the classmates and at the end of the party we will take some photos together.
I understand that you have been busy in the graduation season, but it would be our great pleasure if you could accept the invitation. We are looking forward to your favorable reply.
Yours sincerely,
Li Ming
