You must be on time.为什么要用be?

You must be there on time. you must _____(be) on time next time. You must be on time.为什么要用be? You must be on time for school.的同义句 you must be there on time.此句中为什么要用be ,get不行吗? You must _____ the book on time You must be on time for the important b( ) meeting单词拼写. 怎么读.急.Don‘t arrive late for class.You must be on time. You must be come to the meeting on time I___ A.must B.have to C.will D.should 英语翻译Time is money!Its time and that time must be watched.Time goes on,and I stopped inhere is my silly because of you. We must be on time for cless的意思 我们必须准时为什么省略BE?We must on time? must i time on be 怎么连成一句话啊! I must be on time.对I提问,怎么提问?（ ）must be on time?括号里? I want to make ( )chear to you that you must be here on time next time.A.thatB.this c.veryD.it Mr Li!Can we arrive at school late?Sorry ,you _______ on time.横线上为什么填must be 而不填must? Sorry ,I must be on you ,will be You must do your homework on time 改为祈使句