Am I correct to say "제가 어렸을때 하나 있긴 했는데요."? 하나 있긴 했는데 그들이 가져가 버렸어요. I'm wondering whether the grammar pattern in "있긴 했" is "-긴 하다". If it's really "-긴 하다", when we usually use it? I've tried searching for it but just couldn't get the answer I want. If I'm to tell someone "I used to have one when I was young", can I say "제가 어렸을때 하나 있긴 했는데요." 고맙습니다~