If the person you are talking to is your friend you can say. "I/you would/wouldn't do this." 나(너)라면 이렇게 (안)할거야. "I/you would/n't be helpful." 나(너)라면 도움이 (안)될거야. "I/you would/n't answer back." 나(너)라면 (답변할 거야 / 답변하지 않을거야) "I would/n't be grateful." 나(너) 라면 (고마워할 거야 / 고마워하지 않을거야) If the person you are talking to is someone who you need to be polite to you can say "I/you would/wouldn't do this." 저(his name)라면 이렇게 (안)할 거예요. "I/you would/n't be helpful." 저(his name)라면 도움이 (안)될 거예요. "I/you would/n't answer back." 저(his name)라면 (답변할 거예요 / 답변하지 않을 거예요) "I would/n't be grateful." 저(his name)라면 (고마워할 거예요 / 고마워하지 않을 거예요)