留学生赶作业的英文表达是 "rush due" 或 "hurry to finish due"。这里的 "due" 是 "due date" 的缩写，表示截止日期。所以，如果你要表达赶作业的意思，可以说 "I need to rush my homework due tomorrow" 或者 "I'm hurrying to finish my school assignment before the deadline"。