
Verbo irregular: fall - fell - fallen
Forma simple | Forma con V-ing | 
| I could fall you could fall he could fall we could fall you could fall they could fall  | I could be falling you could be falling he could be falling we could be falling you could be falling they could be falling  | 
Perfecto | Perfecto con V-ing | 
| I could have fallen you could have fallen he could have fallen we could have fallen you could have fallen they could have fallen  | I could have been falling you could have been falling he could have been falling we could have been falling you could have been falling they could have been falling  | 
Forma simple | Forma con V-ing | 
| I couldn't fall you couldn't fall he couldn't fall we couldn't fall you couldn't fall they couldn't fall  | I couldn't be falling you couldn't be falling he couldn't be falling we couldn't be falling you couldn't be falling they couldn't be falling  | 
Perfecto | Perfecto con V-ing | 
| I couldn't have fallen you couldn't have fallen he couldn't have fallen we couldn't have fallen you couldn't have fallen they couldn't have fallen  | I couldn't have been falling you couldn't have been falling he couldn't have been falling we couldn't have been falling you couldn't have been falling they couldn't have been falling  | 
Forma simple | Forma con V-ing | 
| could I fall? could you fall? could he fall? could we fall? could you fall? could they fall?  | could I be falling? could you be falling? could he be falling? could we be falling? could you be falling? could they be falling?  | 
Perfecto | Perfecto con V-ing | 
| could I have fallen? could you have fallen? could he have fallen? could we have fallen? could you have fallen? could they have fallen?  | could I have been falling? could you have been falling? could he have been falling? could we have been falling? could you have been falling? could they have been falling?  | 
Forma simple | Forma con V-ing | 
| couldn't I fall? couldn't you fall? couldn't he fall? couldn't we fall? couldn't you fall? couldn't they fall?  | couldn't I be falling? couldn't you be falling? couldn't he be falling? couldn't we be falling? couldn't you be falling? couldn't they be falling?  | 
Perfecto | Perfecto con V-ing | 
| couldn't I have fallen? couldn't you have fallen? couldn't he have fallen? couldn't we have fallen? couldn't you have fallen? couldn't they have fallen?  | couldn't I have been falling? couldn't you have been falling? couldn't he have been falling? couldn't we have been falling? couldn't you have been falling? couldn't they have been falling?  |