* good 常用来指人的品行好，或事物的质地好，也常用来向别人问好。
Miss Gao is a good teacher.(人好)
Your picture is very good.(物好)
Good moring.(问好)
* fine 身体状况好，天气状况好
---How are you?
---Fine, thanks.(身体状况好)
It's a fine day today.(天气状况好)
另外，fine也可以用来指人物的品行、事物的质地“特别出色”。
He is a fine boy.(人物的品行)
The pen is fine.(事物的质地“特别出色”)
* nice 指人或物的外观、相貌好，“美好的”、“美妙的”、“漂亮的”。
Lucy looks nice.(人的相貌好)
The flowers are very nice.(物的外观好)
Nice to meet you.
* well 做形容词时，指人的身体好，健康好
---How is your father?
---He's very well.
well常做副词，修饰动词用。
* OK 最勤快，有时替fine站岗，有时替well值班，表示身体好。
---How are you?
---Fine, thanks. And you?
---I'm OK.
OK表示事物的完好无损，人的安然无恙。
---Is it broken?
---No, it's OK.
---Oh,sorry!Are you OK?
OK表示赞同别人的观点，“好的”。
---Let's go home.
---OK, Let's go.
