-래요, -대요, -재요 mean "s/he said s/he..." -래요 = -라고 해요, -대요 = -다고 해요, -재요 = -자고 해요 엄마가 학교 가래요. = 엄마가 학교 가라고 해요 Mommy said I should go to school 쟤 남동생 없대요. = 쟤 남동생 없다고 해요 S/he said s/he has no younger brother. 쟤가 같이 공부하재요. = 쟤가 같이 공부하자고 해요 S/he said s/he wants to study together. -실래요 = -시- + -ㄹ래 + -요 -시- is a prefinal ending, you use it to show your respect to the listener. And you use -ㄹ래 in order to say you're willing to do something and in questions in order to make polite offers. -ㄹ래 is said between close friends. In other cases, you should use -요 which is a respectful ending. 같이 갈래? Will you come along with me? 같이 가실래요?

~실래요? ~하실래요? = would u~~ 커피 마실래요? 커피 마시겠습니까? = would u like some coffee??