| Nominativ | dubium, dubiatis, dubia, dubius, hauddubius, dubiumst, haudubia | dubiatis, dubia, haudubia, dubiae, dubii, mandubii |
| Genitiv | dubiae, dubii, dubii, mandubii, mandubii | mandubiorum, mandubiorum, dubiumst, dubiumst, dubiorum, dubiorum, dubiarum |
| Dativ | dubio, dubio, dubioque, dubioque, dubiae | dubiisque, mandubiis, dubis, dubiis |
| Akkusativ | dubium, dubium, dubiumst, dubiumst, dubiam, dubiamque | dubiatis, dubia, haudubia, dubios, dubiosque, dubias |
| Ablativ | dubiatis, dubio, dubia, dubio, dubioque, haudubia, dubioque | dubiisque, mandubiis, dubis, dubiis |
| Vokativ | dubium, dubiatis, dubia, dubiumst, dubie, haudubia, dubietat | dubiatis, dubia, haudubia, dubiae, dubii, mandubii |
