walk 和 take a walk 的差別在哪裡？如果不好說明，請提供一些例句。

Walk is the verb (in its simplest form) so just like in Korean it would be 걷다

("To take" a walk) is an action the verb can be used with, but it's used more in dialects/colloquialism in my opinion seen as I use a lot of dialect (I'm from the North of England)

But to he honest, in standard English, "to go for a walk" sounds much more natural 😊 (and would be more correct in writing really😅)

E.g.
So if you want to talk about what you did yesterday, you'd use the past tense of the verb "to go" which is "went"

I went for a walk.