If you confuse two things, you get them mixed up, so that you think one of them is the other one.
例句
Great care is taken to avoid confusing the two types of projects...大家非常謹慎，以免把這兩類項目弄混。I can't see how anyone could confuse you with another!我不明白怎么會有人把你和另外一個人搞混！
VERB
把…弄糊涂;使困惑
To confuse someone means to make it difficult for them to know exactly what is happening or what to do.
例句
German politics surprised and confused him.德國政治既令他驚訝，又讓他困惑不解。
VERB
攪亂;使復雜化
To confuse a situation means to make it complicated or difficult to understand.
例句
To further confuse the issue, there is an enormous variation in the amount of sleep people feel happy with.使問題進一步復雜化的是，每個人需要的睡眠時間千差萬別。