英语作文邀请函的主要要求：
1。 表示邀请
2。 介绍这个独特的圣诞节晚会
3。 期望Umi参加
范文：
17th Dec。， 2006
Dear Umi，
I am very pleased to write to you。 You know the Christmas Day is coming， so it’s my honor to invite you to take part in the great Christmas party held by our Department Student’s Union。
We are going to hold this excellent party in our Youth Activity Centre。 And we will decorate the party with Christmas trees which are hung with delicate gifts for all of comer。 And what’s more， our department head will appear on the party as Santa Claus。 At the beginning of the party we will dance， and then we sing carols such as Jingel Bells。 Everybody knows that the Christmas Day is derived from west countries。 And now we plan to make dumplings to enjoy the great moment and welcome the coming Spring Festival。 Moreover， we will have interesting games which will help to know more about the different culture between China and America，
We are eager to see you on the party next week! Merry Christmas in advance!
Yours，
Wang Yan
