I have received a exclusion from uni, because I fail 3 courses this semester.So school ask me to write an appeal letter in order to get a chance of re-enrollment. Please help me and give me some advices, thanks a lot!!!

Be honest. Tell them where you need help and what YOU will do in order to make a change and be more successful.

Kristina's suggestions are good ones.

In addition, you should probably be looking at other schools just in case your appeal is turned down. My suggestion is that you find a really good community college and enroll in their English remediation courses. From your writing above, you still need to work on lots of basic skills in English before you should be tackling university-level courses and all the researching and writing involved in them.

For example:
"I have received an exclusion from the university I have been attending because I failed 3 courses this semester. So the school asked me to write an appeal letter in order to get a chance to re-enroll. Please help me and give me some advice. Thanks a lot!!!"

I see issues with verb tenses, plurals of nouns, and run-on sentences. Here are some good places to study online, but learning from a real live teacher simply cannot be replaced.

http://www.eslcafe.com/
Hold your cursor over STUFF FOR STUDENTS and choose what you want to work on.

http://www.manythings.org/
Use the Grammar and Grammar/Vocabulary Quizzes (on the left).

http://a4esl.org/
Grammar quizzes -- to help you narrow down what you need to work on.

http://grammar.ccc.commnet.edu/grammar/

http://esl.about.com/
Lots to browse in here -- list on the left.

http://owl.english.purdue.edu/handouts/esl/eslself.html
Lists of print, audio, and computer self-study materials you can purchase in stores or online.

Here is another point. If they exist, make sure that you include an extenuating circumstances that might have contributed to your failure and why the circumstances will no longer effect your future work.

Even so, the community college alternative is a good one, because you are more likely to receive individual attention (if you ask for it) and the cost is less.

I hope this helps a little more.

I'm sorry to hear about the situation you are in. Writing an appeal letter can be a challenging task, but with some guidance, you can definitely make it effective. Here are some steps to help you write an appeal letter for re-enrollment:

1. Start with a professional tone: Begin the letter with a proper greeting, such as "Dear [School's Name] Appeals Committee."

2. State your purpose: Clearly explain that you are writing to appeal the decision for your exclusion from the university. Be concise and honest about the situation.

3. Provide an explanation: In this section, explain the reasons for your poor academic performance. It could be personal circumstances, health issues, family problems, or any other relevant factors that affected your ability to succeed academically. Be transparent and provide supporting evidence if possible, such as medical records or documentation.

4. Show responsibility: Acknowledge your mistakes and take accountability for your academic performance. Emphasize that you have learned from your experience and are committed to improving.

5. Highlight your determination: Discuss your future goals and aspirations, expressing your commitment to succeed academically. Demonstrate your willingness to put in the necessary effort and take advantage of university resources and support systems.

6. Include any supporting documentation: If you have any additional documents to support your appeal, such as a tutor's recommendation, letters of support from professors, or any other relevant records, make sure to attach them to your letter.

7. Request for reconsideration: Towards the end of your letter, politely request the appeals committee to reconsider their decision and give you a chance for re-enrollment.

8. Sign-off formally: Conclude the letter with a polite and respectful closing, such as "Sincerely" or "Yours faithfully." Include your full name, student ID, and contact information.

Remember to proofread your letter before submitting it to ensure it is well-written and free of errors. It may be beneficial to seek feedback from a trusted mentor or professor to improve your letter further. Good luck with your appeal!