"Tvé stroje neslyšíme."

Translation: We do not hear your machines.

[rthurlow]

Why is "can't hear" incorrect?

[BoneheadBass]

"We cannot hear your machines" is an accepted translation. Duo should automatically recognize and accept "can't." If it didn't, there may have been another problem in your answer, or Duo has a glitch. It's best to paste your full answer (or a screenshot) into your comment, and use the Report button, so we can at least research it before concluding it's a system problem.

[quaan18]

Can you teach me when we can use Tvé, Tvá,......

[VladaFu]

Please start with the Tips and notes of this skill (Possessive Pronouns). Ask if anything is not clear.