good 只用作形容词不用作副词其副词形式用 well, well 既可用作副词也可用作形容词.
1.good 只用作形容词不用作副词其副词形式用 well.
He speaks good English.他的英语说得好.
He speaks English well.他的英语说得好.
She is very well.她身体很好.
Things are well with us.我们事事如意.
注一般说来well 用作形容词时只用作表语而不用作定语(如上例)但在美国英语中well 表示“身体健康”时有时也可用作定语.
1.be good at 与 do well in两者均可表示“擅长”.
He is good at languages.他擅长学语言.
She is good at telling stories.她擅于讲故事.
They all did very well in the examination.他们这次都考得很不错.
注表示擅长某一学科时也可用be good in.
He is good at [in] maths.他擅长数学.
2.as good as 与 as well as用于本义时两者均可表示“与??一样好”但 good 是形容词而 well 是副词.
正He speaks English as well as her.
正His English is as good as hers.
但是用于引申义时两者的意思很不相同as good as 意为“几乎”“差不多”(=almost)as well as 意为“而且”.如 The work is as good as finished.工作差不多干完了.He as good as said I’m a liar.他无异于说我撒谎.She’s clever as well as beautiful.她不但漂亮而且聪明.As well as breaking his leg,he hurt his arm.他不但摔断了腿,而且还伤了胳
例如：She is a good girl.（good在此修饰girl）
He plays basketball very well.(well在此修饰动词play)
as good as与as well as的用法区别
1. 用于本义，两者意为“与……一样好”，但 good 是形容词，而 well 是副词。如：
正：He speaks English as well as her.
正：His English is as good as hers.
(1) as good as 意为“几乎”“差不多”(=almost)。
He as good as said I’m a liar.
We’re as good as ruined.
习语be as good as one’s word意思是“说话算数”。
You’ll find that she’s as good as her word.
(2) as well as 表示“而且”。
She’s clever as well as beautiful.
He speaks Spanish as well as English and French.
A as well as B=not only B but also A
Mary as well as her friends is going to Paris.
As well as breaking his leg, he hurt his arm.
He sings as well as playing the piano.
As well as eating [ate, eat] a seven-course meal, they drank three bottles of wine.