
Verbo regular: argue - argued - argued
Forma simple | Forma con V-ing | 
| I could argue you could argue he could argue we could argue you could argue they could argue  | I could be arguing you could be arguing he could be arguing we could be arguing you could be arguing they could be arguing  | 
Perfecto | Perfecto con V-ing | 
| I could have argued you could have argued he could have argued we could have argued you could have argued they could have argued  | I could have been arguing you could have been arguing he could have been arguing we could have been arguing you could have been arguing they could have been arguing  | 
Forma simple | Forma con V-ing | 
| I couldn't argue you couldn't argue he couldn't argue we couldn't argue you couldn't argue they couldn't argue  | I couldn't be arguing you couldn't be arguing he couldn't be arguing we couldn't be arguing you couldn't be arguing they couldn't be arguing  | 
Perfecto | Perfecto con V-ing | 
| I couldn't have argued you couldn't have argued he couldn't have argued we couldn't have argued you couldn't have argued they couldn't have argued  | I couldn't have been arguing you couldn't have been arguing he couldn't have been arguing we couldn't have been arguing you couldn't have been arguing they couldn't have been arguing  | 
Forma simple | Forma con V-ing | 
| could I argue? could you argue? could he argue? could we argue? could you argue? could they argue?  | could I be arguing? could you be arguing? could he be arguing? could we be arguing? could you be arguing? could they be arguing?  | 
Perfecto | Perfecto con V-ing | 
| could I have argued? could you have argued? could he have argued? could we have argued? could you have argued? could they have argued?  | could I have been arguing? could you have been arguing? could he have been arguing? could we have been arguing? could you have been arguing? could they have been arguing?  | 
Forma simple | Forma con V-ing | 
| couldn't I argue? couldn't you argue? couldn't he argue? couldn't we argue? couldn't you argue? couldn't they argue?  | couldn't I be arguing? couldn't you be arguing? couldn't he be arguing? couldn't we be arguing? couldn't you be arguing? couldn't they be arguing?  | 
Perfecto | Perfecto con V-ing | 
| couldn't I have argued? couldn't you have argued? couldn't he have argued? couldn't we have argued? couldn't you have argued? couldn't they have argued?  | couldn't I have been arguing? couldn't you have been arguing? couldn't he have been arguing? couldn't we have been arguing? couldn't you have been arguing? couldn't they have been arguing?  |