work on to do和work on doing有这种说法吗?和go on to do ,go on doing

work on to do和work on doing有这种说法吗?和go on to do ,go on doing work on doing sth还是work on to do sth? work hard to do和work hard do哪个对? work on和work with和work to有什么区别? do your parents go to work on sundays?怎么回答? I do to work on my weekend是什么意思 work hard on , work hard at, work hard for 和work hard to的用法之差异 how do you go to work?和how do you get to work?有什么区别? 英语to work 和to do work哪个是去工作是begin to work和begin to do work哪个是开始工作 work out 和 work on 的区别 work at和work on和work out的区别 too much work to do 高中英语travel to work on on their way to work work on与work work on something和as to译成中文as to the topic,I'd like to work on language skill work on,work out,work in work to有什么区别求大神帮助 (),we must do work on the machine.A for a machine to do work B for a machine doing work C for ...(),we must do work on the machine.A for a machine to do work B for a machine doing work C for a machine is doing work D a machine works 为什么选A啊?