we mustn't arrive late for class 同义句

we mustn't arrive late for class 同义句 We can't arrive late for class.(改为同义句) 变同义句:Don't arrive late for class. We can't arrive late for school(改为同义句) We can't arrive late for school.改同义句 We can't arrive late for class.（改为祈使句） Well,we can't arrive late for class.仿造句子 We can’t arrive late for school改为同义句We have to get to school We can't arrive late for class能改写成We don't arrive late for c Don't arrive late for shool.(改为同义句） Don't arrive late for school的同义句 为什么在句子中"We can't arrive late for class."中要用arrive