1.首段
①After I read your letter, I am sorry to know that ...
②I know you have trouble in ... after reading your letter.
③I am writing to you for the purpose of ...
④I'm writing to persuade you (not) to ...
⑤In my opinion, it would be wise of you to take the following measures.
2.主体段
①Here are my reasons. First of all, I think it would be better if ... Second, ... Third, ...
②Personally speaking, I really hope ...
③In my opinion, you should ...
④Here I'd like to give my advice on ...
⑤I would like to suggest that ...
3.结尾段
①All things considered, ...
②In brief/In short/To sum up, ...
③I believe you will take my advice into consideration.
④I hope you will find these suggestions practical/useful/helpful.
⑤Please take my advice into consideration and make a final decision.