he run as fast as me. 這句有錯嗎?

應該是 He runs as fast as I (run)
More examples:
Grace is so / as beautiful as you (are) ... the word 'are' is usually omitted
George is so / as tall as John (is)
My watch is so / as expensive as John's (John's watch)
Ivy's son is so / as naughty as mine (my son)

See now ?!

You should say,

He runs as fast as I do.

Shouldn't use me here, because you are talking about the action (verb).

He ran as fast as me. (Proper English)

He runS as fast as me. (The grammer is correct , however, it is consider as bad english)

he 是第三身單數 run 要加 s
He runs as fast as me.

he 係第三身.所以要加s

he runs as fast as me.

after run need to add a 's' because 'he' is 第三身單數.
Example:

He kills me. 'He' is 第三身單數

All 第三身單數 have: He, She, It.