~~~ 없는 줄 알았어요

I thought you didn't have _________ in Korean. = 나는 생각했다 네가 ~가지고 있지 않다고===that is just English grammar order. Korean grammar order is like that: 나는 네가 ~을 가지고 있지 않다고 생각했다. Your practice method is very good because you just have the same grammar structure, but you can change many different objects. In this case, you can say all about this structure. So, that is really great way to practice Korean. Good luck again!!

Both^^

Are you looking to put a noun or a verb in place of the blank? For instance, do you mean "I thought you didn't have lemons" or "I thought you didn't have to go"?