請幫忙用英文寫出以下問題的答案

I've found you an example, but that's too long, cannot be posted ... so please refer to page 24-26 of this link http://www.nps.gov/training/tel/Guides/Resolving_Em_Perf_Issues_060607.pdf
hope that's helpful :)

可唔可以講下點寫?

If you think your sub-ordinate cannot perform well, you need to write a letter to encourage him/her to improve.