英语作文请柬用第三人称。
请柬分正式和非正式两种。非正式其实就是一种便条，多用于亲戚朋友之间。正式的请柬有一定的书写格式，主要用于比拟隆重的拘泥于礼仪的场合，如婚礼、宴会、舞会、招待会、展览会等正式场合。
一、正式请柬没有称呼用语和结束语，都包括在正文之中。
二、正式请柬一般用第三人称，被邀者也多用第三人称，间或也有用第二人称的。
三、被邀者夫妇齐全幼童在一起，应把两者的名字都写入请柬。
四、格式如下：
1、文头：INVITATION CARD。
2、被邀者：首行突出地位。
3、写明事由。
4、邀请者：中间，醒目另起。
5、时间。
6、地点。
7、如对衣着有要求，在下角注明，如无要求，那么可写上Nodress或informal。
请柬格式英文范文
Dear Mr. Harrison：
Our new factory will be commencing production on [April 10] and we should like to invite you and your wife to be present at a celebration to mark the occasion.
As you will appreciate this is an important milestone for this organization, and is the result of continued demand for our products, both at home and overseas. We are inviting all those individuals and trust that you will pay us the compliments of accepting.
Please confirm that you will be able to attend by advising us of your time —— we can arrange for you to be met. All arrangements for your stay overnight on April 10 will, of course, be made by us at our expense.
Yours faithfully.