動詞後面是否接to的問題?

因為to有可能是「介系詞」，也有可能是「不定詞的記號」，所以你的思考方式可能會造成誤解。
He went to school yesterday.這裡的went是「不及物動詞」，後面的to是「介系詞」。但有規則必有例外：He went home.這裡不加介系詞to，雖然went是不及物動詞。
He likes to eat.這裡的like是「及物動詞」，後面的to是「不定詞的記號」，to eat是不定詞。

我們首先要用字典查「動詞」是否「及物動詞」，如果是的話，第二步看這個動詞按文義和語法習慣可否接「有to的不定詞」為「受詞」。

字典記載confuse 是「及物動詞」，通常接「人」或「事物」為受詞，用法有：
1. If you confuse two things, you get them mixed up, so that you think one of them is the other one.
2. To confuse someone means to make it difficult for them to know exactly what is happening or what to do.
3. To confuse a situation means to make it complicated or difficult to understand.
所以未見到confuse後面會有「不定詞」為受詞的現象。

Something that is confusing makes it difficult for people to know exactly what is happening or what to do.
這裡的confusing是由「現在分詞」衍生的「形容詞」，有主動的意思。不是動詞。

If you are confused, you do not know exactly what is happening or what to do.
這裡的confused是由「過去分詞」衍生的「形容詞」，有被動的意思。也不是動詞。

絕對不用to

it doesn t confuse you.

我估計你的混亂了另一種講/寫法

It is (not) confusing to you.
或當你查問聽眾或別人的理解時
Is it confusing (to you)?

假如不是用以上的"動名詞"作為"狀態"來問而用"動詞"問
Does it confuse you?
也是不會加to的。