两封信告诉你 正式与非正式英文有何不同

 　　下面有2封英文书信，你能分辨哪封是正式信件，哪封是非正式的吗？

　　信件1：
　　Dear Sir or Madam,
　　I am writing with regard to a ?ight that I missed due to a mistake by one of your employees.
　　Two weeks ago I was due to catch a ?ight to Rome, where I intended to spend four days on holiday. Unfortunately, the attendant 1 at the check-in desk gave me a boarding card for a different ?ight, and I did not notice the mistake until I arrived at the departure 2 gate and it was too late.
　　As a result of the error, I was not allowed to board the ?ight to Rome, and this caused me great inconvenience. I had to book a new ?ight two days later, which meant that I missed two days of my holiday and I spent an extra ?200.
　　As the mistake was caused by your company, I hope that you will compensate 3 me for the cost of the additional 4 ?ight, as well as for my taxi fares to and from the airport.
　　I look forward to receiving your response.
　　Yours faithfully,
　　Paul Jones
　　信件2：
　　Dear John,
　　I’m just writing to let you know that I’ve moved house.
　　As you know, I went for an interview for a job here in London. Well, they gave me the position! It would have been impractical 5 to travel down from Manchester every day, so we’ve found a house here, in a nice part of London called Greenwich.
　　Our new house isn't ideal 6. London prices are crazy, and we were only able to afford a one-bedroom ?at. But on the bright side, it’s on the ground ?oor, it’s got nice big windows, and a lovely view out onto the garden.
　　If you ever fancy 7 a trip to London, you’re more than welcome to come and stay. It would be great to see you. From where we live, it’s only a quick ride on the underground into the city centre, so we could do some sight-seeing together.
　　Keep in touch!
　　All the best
　　Mike
　　答案是第一封正式，第二封非正式。理由如下：
　　Formal letter
　　正式信件
　　Beginning: Dear Sir or Madam
　　用Dear Sir or Madam开头
　　Stating the purpose: I am writing with regard to
　　用“I am writing with regard to”说明目的
　　Formal choice of language: due to, I intended, as a result of, caused me great inconvenience, compensate me, the additional flight
　　使用以下正式词汇：due to, I intended, as a result of, caused me great inconvenience, compensate me, the additional flight
　　No contractions 8: I am (not "I'm")
　　不使用缩写：写成I am而不是I'm
　　Ending: I look forward to receiving your response. Yours faithfully,
　　结尾： I look forward to receiving your response. Yours faithfully,
　　Informal letter
　　非正式信件
　　Beginning: Dear John
　　用Dear John开头
　　Stating the purpose: I'm just writing to let you know that
　　用“ I'm just writing to let you know that”说明目的
　　Informal choice of language: As you know, Well, prices are crazy, on the bright side, it's got nice big windows, a lovely view, if you ever fancy, great to see you
　　使用以下非正式词汇：As you know, Well, prices are crazy, on the bright side, it's got nice big windows, a lovely view, if you ever fancy, great to see you
　　Use of contractions: I'm, we've, isn't, it's
　　使用缩写：I'm, we've, isn't, it's
　　Ending: Keep in touch! All the best
　　结尾：Keep in touch! All the best