Formal choice of language: due to, I intended, as a result of, caused me great inconvenience, compensate me, the additional flight
No contractions: I am (not "I'm")
Ending: I look forward to receiving your response. Yours faithfully,
非正式表达
Beginning: Dear John
Stating the purpose: I'm just writing to let you know that
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
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在雅思的G类考试的写作中，正式语与非正式语要做好重要的区分，具体句子列举如下： 正式表达
Beginning: Dear Sir or Madam
Stating the purpose: I am writing with regard to
Formal choice of language: due to, I intended, as a result of, caused me great inconvenience, compensate me, the additional flight
No contractions: I am (not "I'm")
Ending: I look forward to receiving your response. Yours faithfully,
非正式表达
Beginning: Dear John
Stating the purpose: I'm just writing to let you know that
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
Use of contractions: I'm, we've, isn't, it's
Ending: Keep in touch! All the best