David and carlos never clean their desks.

david y carlos nunca limpian sus escritorios.

david y carlos siempre limpian sus escritorios.

david y carlos nunca limpia sus escritorios.

david y carlos siempre limpia sus escritorios.

1. David and Carlos never clean their desks.
2. David and Carlos always clean their desks.
3. David and Carlos never clean their desks.
4. David and Carlos always clean their desks.

It would be the first and third, since they are both exactly the same.

Do you have options to chose from?

B) hay que
i’m a spanish native speaker hopes this you : )