英文have同has使用問題 我知道has用於單數或不可數名詞當中， 但我在一些英文教學網站當中看到一句: I don't have much money. 這裡不應該是用has嗎?還是有其他特別文法改變了用法呢? 求幫忙解答。?

has是用在主詞是第三者單數的現在式動詞上。
I是第一者單數，應用have，而且你這句裡面還有助動詞do，也影響到動詞，讓其恢復成原形動詞。

He has a lot of money.（第三人單數的表現放在主要動詞上）
He doesn't have much money.（第三人單數的表現放在助動詞上，主要動詞改用原形動詞）

不是所有單數名詞都是用has的。記住：I,you,we,they 用have;he,she,it用 has

用have是因為I,不是因為money
使用方法是看主詞

I have much money.
I don't much have money.
How much money do I have?

You have much money.
you don't have much money
How much money Do you have ?

He has much money,
he doesn't have much money
How much money does he have?

She has much money.
she doesn't have much money.
How much money does she have?

They have much money .
they doesn't have much money.
How much money do they have?

We have much money.
We don't have much money.
How much money do we have?

Barry has much money.
Barry doesn't have much money.
how much money does Barry have?