I want to be a science teacher one day!中的be是什麽意思 为甚麽要用原型be

I want to be a science teacher one day!中的be是什麽意思 为甚麽要用原型be "i want to be a science teacher one day! I want to be a science teacher one 英语：I want to be a science teacher one day翻译成中文 a,teacher,i,day,science,want,one,to,be连词成句 把I want to be a science teacher one day.改成一般疑问句 肯定句 针对scienc I WANT TO BE A SINGER ONE DAY! I want to be a teacher语法分析 I want to be a teacher be.day.to.want.teacher.i.to.an.one.English连成一句话 对划线部分提问I want to be an english teacher one day I want to be a teacher中的want to 可以用will替换吗?