英语语法分析

I can tell you that unicorns are not cats but unicorns don't meow.

我可以告诉你独角兽不是猫，但是独角兽不会叫。

I can imagine a world with unicorns.

我可以想象一个有独角兽的世界。

I could imagine a world with unicorns.

我可以想象一个有独角兽的世界。