英文 No Kidding ,for i'm busy

I‘m not kidding.I'm no kidding.哪句正确?怎么区分NO,NOT are you kidding?no I I'm serious! Are you serious? No, I'm kidding. 的中文解释 I'm kidding I'm really busy now and I have no time for l(L) 英语改错Can you close the door for me?No,i'm busy are you kidding?no,i am serious. 【脑筋急转弯】翻译； Are you kidding?——No,I 'm serious. believe me.I'm not kidding you. I'm just kidding什么意思 I miss you,very miss you!but I'm still busy,so busy no time 英语翻译某电影：-Are?you?serious?-No,I’m?kidding.中文字幕：你是席而瑞斯吗?不是,我是凯