1.good 是形容词,而 well 是副词
他说英语说得跟她一样好
He speaks English as well as her.
His English is as good as hers.
2.用法
as well as
（1）as well as构成同级比较结构，意为“和……一样好”。这时，第一个as是副词，第二个as是连词，引导一个状语从句，表示同级比较。
He speaks English as well as a native speaker.他讲的英语是和英语是母语的人一样好。
（2） 如果as well as连接的是两个简单动词形式，它和第二个动词实际上起着插入语的作用，这时as well as后的动词在人称和数上应与主语保持一致。
as good as
（1）as good as用于字面义，表示“与……一样好”，可视为as…as结构与good的自然搭配；若用作习语，则表示“几乎”“无异于”“实际上”
（2）搭配，其翻译不能随便从字面来理解：
(as) good as a play 非常有趣
(as) good as gold 表现很好的
(as) good as new 完好如新
as good as one’s word 守信
as good as pie 很好的，可爱的，讨人喜欢。
扩展资料
as well as 双语例句
1.They visited some factories, hospitals as well as the school.
他们参观了这所学校，还参观了工厂和医院。
2.Freud postulated that we all have a death instinct as well as a life instinct.
弗洛伊德曾假定我们所有人都有生存本能和死亡本能。
3.It is in his best interests as well as yours
这符合他的最大利益，同时也符合你的利益。
4.Scientists should be literate and articulate as well as able to handlefigures
科学家除了要能处理数字，还应该具有文学素养和善于表达。
as good as双语例句
1.It looks as good as new.
看上去和新的无异。
2.His career is as good as over
他的事业差不多完蛋了。
3.His Arabic was not as good as his English, but serviceable enough
他的阿拉伯语没有他的英语好，但是够用了。
4.My English is not as good as his.
我的英语学得不如他好。