pleasant. pleasure . pleased 怎么用的啊？？什么区别那？？谢谢

pleasant 是形容词，代表某东西是“让人心情愉快的”
This flower has a pleasant smell.

pleasure 是名词，代表“荣幸”
It is my pleasure to do sth.

pleased 是形容词，代表人的“心情高兴／很安慰”
I am so pleased that you finally success.我为你的成功感到高兴和安慰

Hope you have a pleasant day。希望你今天过的好。
It was my pleasure to help。帮助你是我的荣幸
I am so pleased to meet you.我真的很高兴见到你。