【初中情态动词用法两道题Don'tforgettocometomybirthdaypartytomorrow..A.Idon'tB.Iwon'tC.Ican'tD.Ihaven't答案是B,选A为什么不行?Couldyoupleasepassthebookontheshelftome?--.A.Youa】

　　初中情态动词用法

　　两道题

　　Don'tforgettocometomybirthdaypartytomorrow..

　　A.Idon'tB.Iwon'tC.Ican'tD.Ihaven't

　　答案是B,选A为什么不行?

　　Couldyoupleasepassthebookontheshelftome?--.

　　A.YouarewelcomeB.No,Icouldn'tC.Certainly.HereyouareD.Yes,Icould

　　答案是C,选B或D为什么不行?