我感谢你在这件事上给予的建设性建议。

I appreciate your ___constructive advice on the matter.

他的反馈总是很有建设性和帮助。

His feedback was always ___constructive and helpful.

这次会议非常有建设性，催生了几项新想法。

The meeting was very ___constructive and led to several new ideas.