how to say "it's not working!" in korean I want to know how to say "it's not working" for situation that something is not function. For example. Im using subway pass card but it's not scanning. I would say "it's not working". Or I'm using vending machine or some machine that won't function I would say "it's not working"

How to say im dying of laughter in korean? I want to know how to say I am dying of laughter in korean. Also I want to say I can't stop laughing. I know 웃다 is to laugh and 멈출 수 없다 is to can't stop but how do I add a verb in front of it?

How to say "I thought you didn't have_____" in korean I would I say this? Both formally and informally.

안녕하세요 italki^^ 안녕하세요^^ 한국어를 배우고싶어요. 한국말 잘 못해요 ㅠㅠ 한국말 잘 하고싶어요. 오늘은 제가 한국어를 공부했어요. 친구를 만나고싶어요^^

학교에 가면 똑똑할 수 있어. Does this mean if (I/you) go to school then (I/you) can be smart?? Or do I write it another way?