"Ale to není strom."

Translation: But that is not a tree.

[JorritBleeker]

Why is "But that is not the tree" wrong in this case?
In case of "the tree" would I have to use TOTO instead of TO?

[VladaFu]

That would be "Ale to není ten strom." though I would still prefer "that tree" over "the tree".

[eric461692]

I am unsure where the verb "is" comes from in the czech version. To my mind the direct translation would be "But that not tree."

[VladaFu]

není = isn't

[j1543987]

Could somebody please tell explain to me Czech capitalisation? Duolingo is very confusing with that.

[VladaFu]

What is confusing? Start of a sentence and proper names are capitalized.