I could falsify you could falsify he could falsify we could falsify you could falsify they could falsify
Forma con V-ing
I could be falsifying you could be falsifying he could be falsifying we could be falsifying you could be falsifying they could be falsifying
Perfecto
I could have falsified you could have falsified he could have falsified we could have falsified you could have falsified they could have falsified
Perfecto con V-ing
I could have been falsifying you could have been falsifying he could have been falsifying we could have been falsifying you could have been falsifying they could have been falsifying
Negación
Forma simple
I couldn't falsify you couldn't falsify he couldn't falsify we couldn't falsify you couldn't falsify they couldn't falsify
Forma con V-ing
I couldn't be falsifying you couldn't be falsifying he couldn't be falsifying we couldn't be falsifying you couldn't be falsifying they couldn't be falsifying
Perfecto
I couldn't have falsified you couldn't have falsified he couldn't have falsified we couldn't have falsified you couldn't have falsified they couldn't have falsified
Perfecto con V-ing
I couldn't have been falsifying you couldn't have been falsifying he couldn't have been falsifying we couldn't have been falsifying you couldn't have been falsifying they couldn't have been falsifying
Forma interrogativa
Forma simple
could I falsify? could you falsify? could he falsify? could we falsify? could you falsify? could they falsify?
Forma con V-ing
could I be falsifying? could you be falsifying? could he be falsifying? could we be falsifying? could you be falsifying? could they be falsifying?
Perfecto
could I have falsified? could you have falsified? could he have falsified? could we have falsified? could you have falsified? could they have falsified?
Perfecto con V-ing
could I have been falsifying? could you have been falsifying? could he have been falsifying? could we have been falsifying? could you have been falsifying? could they have been falsifying?
Forma interro-negativa
Forma simple
couldn't I falsify? couldn't you falsify? couldn't he falsify? couldn't we falsify? couldn't you falsify? couldn't they falsify?
Forma con V-ing
couldn't I be falsifying? couldn't you be falsifying? couldn't he be falsifying? couldn't we be falsifying? couldn't you be falsifying? couldn't they be falsifying?
Perfecto
couldn't I have falsified? couldn't you have falsified? couldn't he have falsified? couldn't we have falsified? couldn't you have falsified? couldn't they have falsified?
Perfecto con V-ing
couldn't I have been falsifying? couldn't you have been falsifying? couldn't he have been falsifying? couldn't we have been falsifying? couldn't you have been falsifying? couldn't they have been falsifying?