要坚持下来用英语可以用 "persevere" 或者 "stick with it" 来表达。

"Persevere" 是源自拉丁语 "perseverare"，意思是坚持不懈、执着。例如：

She persevered through the difficult times and eventually achieved success. (她在困难时期坚持不懈，最终取得了成功。)

"Stick with it" 就是坚持下去的意思，例如：

If you stick with it, you'll get better at playing the guitar. (如果你坚持下去，你会变得更擅长弹吉他。)

另外，还有一些表达方式可以表示坚持下去的意思，例如：

Hang in there. (坚持下去。)
Keep going. (继续前进。)
Keep on keeping on. (坚持不懈。)
Don't give up. (不要放弃。)