思路：
先开门见山地回复别人，比如如果是回复岗位offer，就回复自己是否要接受该offer，然后详细描述其原因，最后署名。
可以这样写：
for the position. I will graduate from commercial school nextmonth. My outstanding record at school and some experience inbusiness has prepared me for the work you are calling for.
I am really interested in learning business practice， andalso a diligent worker and fast learner. If given a chance，am sure I can prove my worth in your company.
I will be available during the weekdays in the morning forany interviews you may want to give. Enclosed is my resume， andhoping for your immediate reply.
Sincerely yours，
X,XX
中文翻译：
对于这个位置，我下个月将从商学院毕业，我在学校的出色表现和一定的经商经验使我为您所需要的工作做好了准备。
我对学习商业实践非常感兴趣，并且是一个勤奋的工作者和快速学习者。 如果有机会，我肯定可以在贵公司证明自己的价值。
在您工作日的上午，您可能需要进行任何面试，我都会为您服务。 随信附上我的简历，并希望您能尽快得到答复。
您的X，XX
1、 接受邀请的复信中应重复写上邀请信中的某些内容，如邀请年、月、日，星期几、几点钟等，如 “I’ll be delighted to attend your luncheon next Friday, May the fifth, at twelve o’clock”。
2、邀请信的复信中应明确表明接受邀请还是不接受邀请，不能含乎其词，如不能写 “I’ll come if I’m in town”。这类的话，以使得对方无法作出安排。在接受邀请的复信中，应对受到邀请表示高兴。谢却的复信中应阐明不能应邀的原由。
3、 接受与不相识的人共进午餐 Accepting an invitation to luncheon with strangers
Dear [Wang Hua]:
I’ll be delighted to come to your luncheon on [Tuesday, April the sixth], at [on] o’clock.
[Bob] has often spoken me of [Wang Hui], and has told me how very much he enjoys having him for a [roommate /teammate]. Although I have never met [Wang Hui], I know him from hearing so much about him.
I assure you it will be a very great pleasure indeed to meet [Wang Hui’s mother]! Thank you so much for asking me.
Truly Yours
本回答被网友采纳1）Thank you for your kind invitation to…
2）I shall be very happy to come.
例句：Thank you for your kind invitation to the dinner given next Saturday to your brother. I shall be very happy to come, and look forward to meeting your brother.
2、婉谢：
1）Thanks for asking me.
2）I’m so sorry that … because …
例句：
I am so sorry that I cannot come to the dinner given next Saturday for your brother because of a previous engagement that evening.
Anyway, I do appreciate your asking me and hope that I will have the opportunity to meet your brother in the near future.本回答被网友采纳
1. 接受邀请的复信中应重复写上邀请信中的某些内容，如邀请年、月、日，星期几、几点钟等，如 “I’ll be delighted to attend your luncheon next Friday, May the fifth, at twelve o’clock”。
2. 邀请信的复信中应明确表明接受邀请还是不接受邀请，不能含乎其词，如不能写 “I’ll come if I’m in town”。这类的话，以使得对方无法作出安排。在接受邀请的复信中，应对受到邀请表示高兴。谢却的复信中应阐明不能应邀的原由。
1. 接受与不相识的人共进午餐 Accepting an invitation to luncheon with strangers
Dear [Wang Hua]:
I’ll be delighted to come to your luncheon on [Tuesday, April the sixth], at [on] o’clock.
[Bob] has often spoken me of [Wang Hui], and has told me how very much he enjoys having him for a [roommate /teammate]. Although I have never met [Wang Hui], I know him from hearing so much about him.
I assure you it will be a very great pleasure indeed to meet [Wang Hui’s mother]! Thank you so much for asking me.
Truly Yours
亲爱的[王华]:
我将愉快地参加您于[4月6日（星期二）下午1时]举行的午宴。
[鲍勃]经常向我提起[王晖]，并经常谈到与他[同住一室/为队友]是多么愉快。虽然我还没有见过他，但因为听到有关他的事情多，好像已经认识他了。
我相信，同[王晖的妈妈]相会一定会使人非常愉快，非常感谢您的邀请。
2. 谢绝不相识的人的邀请 Apologizing for being unable to accept an invitation
Dear [Mrs. Brown]:
I have heard so much about [Lambert] from [Jane] that I almost feel as though I knew him. I would certainly enjoy meeting his mother!
But unfortunately I expect guests myself on [Friday, the seventh of May]; and therefore cannot accept your invitation for luncheon on that day.
It was thoughtful of you to invite me, and I am extremely sorry I cannot accept, I do hope you will ask me again some time!
Sincerely yours,
亲爱的[布朗]:
我已经从[简]那里知道了许多关于[兰伯特]的事，我好像已经认识他似的，能够去见他母亲我当然觉得十分荣幸！
但是很不凑巧:在[5月7日（星期五）]我自己要招待客人， 因此就不能接受您在那天的午宴邀请了。
承您如此热情地相约，恰巧因事不能前往，深表歉意，但愿以后能再次荣获您的邀请。
3. 对迟复邀请表示歉意 Apologizing for being unable to give an early reply
Dear [Mr. Jackson]:
Please accept my apologies for the delay in acknowledging your invitation for [lunch/ diner/ cocktails] on [September the fourth, this year]. I have been away from the office and only just returned.
Luckily, I have no other plans for the date you mention, and shall be happy to see you at [6] at the Black Swan Restaurant.
Cordially,
亲爱的[杰克逊先生]:
未能对您发来的出席今年[9月4日]举行的[午宴/晚宴/鸡尾酒会]的邀请给予及时答复深表歉意。我因近期一直在外，刚刚返回。
幸运的是，我在那天没有其他安排，很愿意届时在[黑天鹅餐厅]与您会面。
4. 对不能参加而迟复邀请回信表示歉意 Apologizing for being unable to accept the invitation and give an early reply
Dear [Mr. Hovell]:
Please accept my apologies for the delay in acknowledging your invitation for [lunch/ dinner/ cocktails] on [September the fourth, this year]. I have been away form the office and only just returned.
Unfortunately, I have other plans for the date you mention, but shall be happy to make a date for some other convenient time.
Cordially,
亲爱的[霍维尔先生]:
未能对您发来的出席[今年9月4日]举行的[午宴/晚宴/鸡尾酒会]的邀请予以及时答复深表歉意。我因一直外出，刚刚返回。
很遗憾，由于有其他事务安排，故不能赴约。我很愿意在以后方便的时候前去拜会。