寫信技巧?

first thing: you should have a good reason to request for the extension. for example: you did not have a time to attend the course

Dear Sir

re: extend the completion date of course

I am writing to request the extension of the completion date of course. As requested by my job, I need to stay at China factory for few days every week. So, I can't attend the course on time and also didn't have a time to study the course materials.

I hope that you could understand my bad situation and accept my request to extend the completion date to 30th June, 2007 (for example)

If you have any enquiries, please phone me at 9xxxxx or send mail to my mailbox: [email protected]

Thank you for your helpful!

Best regards
your name