A man who never gave up

　　这个钱你们等几天行吗？过几天我就还给你。

　　另外，was able 还表示”成功地做到”，相当于managed to do sth/succeeded in doing sth

　2. We can come up with the answer together.

　　我们可以一起发现答案。

　　come up with (an answer)意思为find or produce a way to solve, or an answer “发现， 产生/解决办法或答案”。但是，不能说An idea is come up with。如：

　— He came up with an idea for making kite.

　— How could he come up with this idea?

　— 他想出了做风筝的办法。

　— 他怎么想出这个主意的？

　3.  We just need to keep working on it and not give up.

　　我们需要坚持做下去，不能放弃。

　（1）keep dong sth.意思为“继续做某事”或“不断/反复做某事”。如：

　　Keep reading, and your English will be better and better.

　　坚持阅读，你的英语会越来越好。

　　Keep on doing something也是继续做某事的意思。但是，此时表示在持续的过程中时有间断。如：

　　He is a famous writer. He keeps on writing every day.

　　他是一位著名的作家。他每天都坚持写作。

　　work on sth意思是“从事……工作”如：

　　The writer is working on a new book. The scientist is working on a new plan. We must work hard on all subjects.

　　这位作家正在写一部新书。科学家正在研究新计划。我们应该努力学习各门功课。

　（2）give up 意思为“放弃，停止”，后面可跟动名词形式作宾语。如：

　　Give up smoking! It’s no good to you! 戒烟！烟对你没好处！

　　I can do nothing more. I have to give up.

　　我无能为力，只好放弃。