给两篇你参考吧
1.邀请朋友同他们不认识的人一起共进晚餐 Inviting friends to supper with the strangers
　　Dear Susan:
　　I know you are interested in oil painting,so I’m sure you’ll be interested in Mr.and Mrs.Lin dun!They are coming here to supper next Sunday night,October the twelfth,and we’d like you and Walter to come,too.
　　Mr.and Mrs.Lin Dun are that very charming couple we met in London last summer.They have a wonderful collection of oil paintings of various stages; and I understand that Mr.Lin Dun is quite an authority on oil painting.I’m sure you and Walter will thoroughly enjoy and evening in their company.
　　We’re planning supper at six; that will give us a nice long evening to talk.If I don’t hear from you before then,I’ll be expecting you on the twelfth!
　　Affectionately yours,
　　Li Ming
　　亲爱的苏珊:
　　我知道您对油画是有兴趣的,所以我相信您对林顿夫妇也会感兴趣.他们将在10月12日(下星期日)来吃饭,我们很希望您和瓦尔特也能同来.
　　林顿夫妇是那么好的一对夫妻.我们是去年夏天在伦敦认识的.他们集有各个不同时期精美的油画作品.我知道,林顿先生在研究油画方面是颇有权威的.我深信,那天晚上您和瓦尔特同他们在一起,一定会很愉快.
　　我们准备在6点钟吃晚饭,这样就能有较长的时间闲谈.如果事前接不到您的回信,我就指望你们那天到来.
2.邀请来家中小住及周末聚会 An invitation for a house and weekend party
　　Dear Jane:
　　I hope you and Fred haven’t any plan for the weekend of July twenty-fourth as we’d like you to spend it with us at Far Acres.It’s simply beautiful here now,with everything in bloom!
　　I think we can promise Fred some good fishing this year.The fish are biting better than ever!So bring your fishing clothes; and be sure to bring your tennis things,too,because the Owens are coming and I’m sure you’ll want to get out on the courts with them.
　　There’s a very good train Friday night; I’ve marked it in red on the timetable.It gets you here about seven-thirty which is just in time for dinner.You can get a late train back Sunday night,or there’s an early express that Bob usually takes on Monday morning.
　　We hope nothing will prevent you from coming,as we’re looking forward to your visit … and I know the Owens are looking forward to seeing you again,too.Be sure to let us know what train you are taking so that Bob can meet you at the station.
亲爱的简:
　　如果您7月24日没有什么活动安排,我希望您和弗雷德能同我们一起在远庄园共度周末,那里已经鲜花遍地,现正在最美丽的时节.
　　我想,今年我们能让弗雷德钓鱼钓得更快活.鱼儿比过去任何时候都爱上钓鱼.请把钓鱼的服装带来,也别忘记带上打网球的用具,因为我们还邀约了欧文夫妇,我想,你们是乐意同他们打网球的.
　　星期五晚上有一班舒适的火车,我已经在火车时刻表上做了红色记号,火车大约在7点半钟把你们送到这里,正是吃晚饭时间.星期日晚上你们可以乘晚车回来.或者,在星期一早晨也有一班快车,就是鲍勃常坐的那一班车.
　　我们希望没有什么事情会阻碍你们,我们在等待着你们光临……我知道欧文夫妇好盼望再次见到你们.准备乘哪一班火车,请一定告诉我们,好让鲍勃到车站迎接你们.