根据题目的要求，该邀请便条应属于非正式类。
10 a. m. March 17
Dear Hilda，
I have got two tickets for the concert given by the famous pop band Oasis at 7 p.m. this Saturday at Workers"Stadium. (说明邀请的缘由、时间和地点)I love this band very much. Are you interested to come to the concert with me？ I assure you"ll love them.(提出邀请)Send me a text message ASAP. (要求回复)
Yours，
Melinda
三、感谢信
感谢信(note of acknowledgement)在中西方的作用和地位不太一样。在中国，如果我们表示感谢，一般会在当时就表达了，或以后亲自登门来表达谢意。只有陌生人帮助了我们或者归还了我们遗失的巨额财物，我们才会给这个人所在的单位写感谢信，所以感谢信在中国不是很常见。但在西方国家，人们一般在事后写感谢信来表示谢意，所以感谢信很常见。例如，有人请你吃饭，一般在第二天，你需要给主人写一个致谢便条，以表达你对他们款待的感谢。感谢信一般分为三部分：
首先描述感谢的心情，然后陈述感谢的原因，最后呼应开头，再次表达感激之情，或是想要报答对方的意愿。感谢类的便条一定要情真意切，发自真心，绝对不能过分渲染，过分夸张，但也不能敷衍了事。
范文1
Write a note of about 50～60 words based on the following situation：
You have got a crystal necklace from your boyfriend Erik as your birthday gift. You love the necklace very much and express your thanks to him.
Oct．27， 2007
Dear Erik，
Thank you for the gorgeous crystal necklace you gave me for my birthday. (表明感谢之情)You know， I have desired for a crystal necklace for a long time and it goes so well with the color of my eyes. (阐述感谢的缘由)I hope you can see how joyful I am wearing the necklace. Again many thanks for you. (再次表述感谢之情)
Love，
Amanda
范文2
Write a note f about 50～60 words based on the following situation：
Your roommate，Bree，helps you a lot when you are in the hospital．You are deeply moved，and decide to write a note to express your thanks．
Sept．12， 2007
Dear Bree，
I fail in words to express my gratitude for what you have done during my stay in the hospital. (表明感谢之情)The note you took for me help me miss nothing in my study and I love so much the flowers and fruits you bought for me. (阐述感谢的缘由) Once again millions of thanks for your tender and loving care. (再次表达感谢之情)
Cordially yours，
Amanda
表示感谢的便条也有其固定的句型，现将这些固定句型归纳如下：
◆ Thank you very much for the terrific sendoff for us.
◆ Allow me to thank you for the wonderful dinner prepared for me.
◆ I"d like to express my heartfelt thanks for your hospitality.
◆ I am writing to tell you how grateful I am for what you have done for me.
◆ I want to thank you for the trouble you have taken.
◆ Once again，many thanks for your time and effort.
◆ Please accept my sincere thanks and best wishes.
◆ Thank you very much from the bottom of my heart.
◆ It would give us a great pleasure to render you a similar service should an opportunity occur.
◆ Many thanks again for your beautiful book.
◆ I would love to extend my thousands of thanks to you.
◆ I thank you for your kind entertainment last evening.
◆ I shall have great pleasure in accepting your invitation.
◆ Accept my thanks for your handsome present.
四、道歉信
表示道歉的便条最重要的是态度问题，必须态度诚恳。致歉类的便条(note of apology)可以按照如下三个步骤来写：首先表达歉意，应该注意语气和态度；其次，说明原因，应当如实陈述；最后，请求原谅，并提出弥补的措施等。
范文12001年英语专业四级考试作文真题
Write a note of about 50～60 words based on the following situation：
Yesterday you failed to turn up for the appointment with your teacher， Professor Wang. Write him a note of apology and make a request for another meeting. You should also suggest the time for the requested meeting.
Oct．27， 2007
Dear Professor Wang，
I feel terribly sorry that l failed to make out yesterday"s appointment with you. (表示歉意)My ankle was strained when I was having my PE class yesterday. My classmates sent me to the hospital and the doctor required I have a rest. (说明原因) I hope you can forgive me. (再次请求原谅) I know you are fully occupied these days， but is it possible to arrange another appointment？ Could 7：00 p.m．Friday be all right？ I am looking forward to your reply. (提出补救措施)
Respectfully yours，
Amanda
范文22002年英语专业四级考试作文真题
Write a note of about 50～60 words based on the following situation：
Your friend Clare has invited you to her housewarming party this weekend. However， you will be away then. Write her a note politely declining her invitation and expressing your best wishes to her.
Oct．27， 2003
Dear Clare，
Congratulations on your moving into a new， big house and thank you for inviting me to your housewarming party. However， I"m sorry that I won"t be able to come. (表示歉意)I will have to attend a very important meeting this Friday evening. (说明原因) I hope you will understand(请求原谅)and I will send a gift to you for this special occasion. I hope you enjoy your party. Best wishes.
Yours，
Amanda
下面是一些在写致歉便条时常用的句型结构：
◆ I"m terribly/awfully sorry to tell you that....
◆ It is a great pity/regret to miss your birthday party．
◆ I sincerely express my apology for not returning your book on time.
◆ Much to my regret that I am unable to keep our appointment at 7 o"clock this evening.
◆ Please excuse me for troubling you so much in this matter.
◆ We hope you will pardon us for our fault.
◆ Do forgive me.
◆ We regret for the inconvenience we have caused you.
◆ We wish to express our deep regret for the annoyance.
五、祝贺信
祝贺信(note of congratulation)是在亲人、朋友或者同事升职、毕业、结婚时所写的表示祝贺的信，所以祝贺信的语气和措辞都应该是积极的、喜悦的。祝贺信一般在开头表达对某事的祝贺，之后往往会加入一些对取得该成就或者这件喜事的评论或看法，最后送上真诚的祝福。
范文1
Write a note of about 80～90 words based on the following situation：
You heard from your friend that your highschoolmate Anderson got married last month. You decided to write a note to congratulate him on this happy occasion.
February 16
Dear Anderson，
I am delighted to hear of your recent marriage and would like to send you my warmest congratulations and best wishes for a very happy married life together. (祝贺) Everything I"ve heard about Emily points to her having the qualities that make an excellent wife. I can"t think of two people more suited to each other than you and Emily. (评论看法) I am sending you a small present with this letter and I hope you will find it of some use.
With my best wishes to you both. (祝福)
Cordially，
Ann
范文2
Write a note of about 80～90 words based on the following situation：
Your friend Charlie has just finished his Master"s Degree with a remarkable performance. You decided to write him a note to send your hearty congratulation.
July 8
Dear Charlie，
