The following is a dialogue between Minho and his parents. They are talking about the visit to Grandpa's.  Let's read and practice.

Min-ho  : Mom, can I go to a computer show this Saturday?

          엄마, 이번 토요일에 컴퓨터 쇼에 가도 되나요?

Mom   : I'm afraid not.        You're supposed to visit Grandpa this Saturday.

          미안하지만 안돼.     넌 이번 토요일에 할아버지를 방문하기로 되어있잖니

        Don't you remember?  기억 안나?

Min-ho  : I do, but you need to know a lot about computers these days.

          기억해요, 하지만 요즘엔 컴퓨터에 대해 많이 알아야 하잖아요.