work on it 能不能写成work it on.如果不能,为什么?

work on it 能不能写成work it on.如果不能,为什么? It's hard work.写成感叹句 work on与work work it I find it difficult to do the work.能不能写成I find it is difficult to do the work.?如题.不要告诉我it是形式宾语之类的话. work on work.for 区别 They ____ it for hundreds of years.空里填work还是work on还是work in还是work at work work it out呢? this is ____ ,so we must ____ on it.A.a hard work;hard work B.hard work;work hardC.hard work;hard work D.a hard work;work hard dream it,and work on it怎样翻译 They carried on ------------ though it was darkA workB with a work C workingD to work work work work work work work work