You have made me what I am today. 上述句子中的what I am today為何不是形容詞子句? 形容詞子句不是能修飾受詞? 怎麼判斷?

"what I am today" is a nominal relative clause, which functions like a noun phrase (i.e. 先行詞 + 關係子句)
"what" = "the thing that"

You have made me [the thing that] I am today.
To be specific, people will often name "the thing" to say something like:
- You have made me the player (that) I am today.
- You made me the singer I am today.
- etc.

"what I am today" is the noun complement of the object "me".

This pattern is similar to an interrogative clause follows the noun"me"

You have made me--------S+vt+noun
what I am today-------interrogative clause
----------------------------or adv.cl.modify the verb"have made"
----------------------------or noun cl.as complement or direct object.
----------------------------but cannot be an adj.cl. qualifying "you have made me".in an uncertainty tense and modality.

what I am today 是名詞子句當成受詞補語,因為made 是授與動詞!!

這是受詞補語
類似You have made me crazy.
crazy形容me
原句what I am today形容me