A向B提出意见。
A: B, you have done well in this area, blar blar ... (Give positive description of B, saying how B has done well - a matter of fact.)
AND I think blar blar...(Tell B the the problem in brief. Use AND and never use BUT. Stop when finish telling the problem, don't go to far with the problem and don't give your opinion by this time. A fact.)
B: Thank you for your suggestion. What do you think I can improve? (What do you think I can do when facing this situation blar blar....)
(Understand the problem mention by A.)
A: I think ... (Give your personal opinion on the problem.)