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- I've been hard at it all the morning. 我一上午都在卖力地干。
- My English is very poor, so I will work hard at it. 我的英语水平很差,所以我得努力学习它。
- I've been going hard at it all day. I'm exhausted. 我一整天辛苦地工作,感到很疲惫了。
- I studied art and worked hard at it. 我学艺术,而且很用功。
- You must have worked very hard at it. 你一定花了很大劲。
- The policemen were already hard at it when we reached the scene of the accident. 当我们到达肇事地点时，警察们已经在哪里忙开了。
- When I left they were all still hard at it(= working hard). 我离开的时候他们都还在努力工作。
- You can make great progress in your English if you work hard at it. 如果你努力学习,你就会在英语方面取得很大进步。
- You can make rapid progress in your English if you work hard at it. 如果你努力学习,你的英语会迅速取得进步。
- Whatever you do, work hard at it and don't try to dodge the column. 无论做什么事, 都要努力去做, 别偷懒。
- He's been hard at it for several months now,and nothing we do can restrain him. 他酗酒已好几个月，我们怎么也制止不了他。
- Some people dream of success, while others wake up and work hard at it. 有些人梦想成功,有些人则是在梦醒之后为此努力拼搏。
- I am only an average man but, by George, I work harder at it than the average man. 我只不过是个一般水平的人，但我的确比一般水平的人工作得更为勤奋。
- Not all students be good at studying English, but if we work hard at it; we will do better and better in it. 不是所有学生擅长学习英语,但如果我们努力学习,成绩会越来越好。
- I scrubbed hard at the stain to see if I could get it off. 我使劲擦这个污迹，看能不能将它去掉。
- Most people I meet have some English ability, but the ones who work hard at it really stand out from the crowd. 我遇到的多数人都会点英语,但只有那些刻苦学习的人才会鹤立鸡群,给我很深刻的印象。
- I want to work hard at it to be able to speak Spanish fluently as "rapido" as possible. 每天跟自己说，“你只要相信自己，没什么打不了！”
- You are putting across your company's image and should work just as hard at it on the phone as you would in person. 你实际上是在为公司树立形象,因此应该就像面见对方一样尽可能打好电话。
- There is no easy way to learn English well ,you'll just have to work hard at it . 学好英语不是轻而易举的事，谁都得下苦功夫。
- He looked at it with dilated eyes. 他睁大了眼睛看它。
