They've got a power and a force
That you've never seen before
They've got the ability to morph
And to even up the score
No one could ever take them down
^^^^^
The power lies on their side
因为最后一句是现在式, 想请问这里为何用could而非can?
谢谢!

https://tinyurl.com/ycku4wy8 这里的是歌词是No one can ever take me down (我在别处听的影音档听到的也是 can )... take them down

前四句都在讲之前到现在的状态，当然是用 could 因为从来没人打击过他们。最后一句虽是现在呈现可是这也强调他们从以前到现在都是有能量的。不能用最后一句去推想前一句，反之是前四句推算第五句，你说的 could 部份