有人邀请你星期六去参加派对 但是你很忙,上午参加英语竞赛 下午去足球俱乐部 晚上去爷爷家

Thank you for your inviting,but I'm afraid I can't go to the party that day.Because I have to do a lot of things on Saturday.I will take part in an English contest in the morning.In the afternoon I must go to the football club.And I will go to see my grandfather and have dinner with him in the Saturday evening.I'm sorry I can not go to the party.Have fun