
Verbo irregular: hear - heard - heard
Forma simple | Forma con V-ing | 
| I could hear you could hear she could hear we could hear you could hear they could hear  | I could be hearing you could be hearing she could be hearing we could be hearing you could be hearing they could be hearing  | 
Perfecto | Perfecto con V-ing | 
| I could have heard you could have heard she could have heard we could have heard you could have heard they could have heard  | I could have been hearing you could have been hearing she could have been hearing we could have been hearing you could have been hearing they could have been hearing  | 
Forma simple | Forma con V-ing | 
| I couldn't hear you couldn't hear she couldn't hear we couldn't hear you couldn't hear they couldn't hear  | I couldn't be hearing you couldn't be hearing she couldn't be hearing we couldn't be hearing you couldn't be hearing they couldn't be hearing  | 
Perfecto | Perfecto con V-ing | 
| I couldn't have heard you couldn't have heard she couldn't have heard we couldn't have heard you couldn't have heard they couldn't have heard  | I couldn't have been hearing you couldn't have been hearing she couldn't have been hearing we couldn't have been hearing you couldn't have been hearing they couldn't have been hearing  | 
Forma simple | Forma con V-ing | 
| could I hear? could you hear? could she hear? could we hear? could you hear? could they hear?  | could I be hearing? could you be hearing? could she be hearing? could we be hearing? could you be hearing? could they be hearing?  | 
Perfecto | Perfecto con V-ing | 
| could I have heard? could you have heard? could she have heard? could we have heard? could you have heard? could they have heard?  | could I have been hearing? could you have been hearing? could she have been hearing? could we have been hearing? could you have been hearing? could they have been hearing?  | 
Forma simple | Forma con V-ing | 
| couldn't I hear? couldn't you hear? couldn't she hear? couldn't we hear? couldn't you hear? couldn't they hear?  | couldn't I be hearing? couldn't you be hearing? couldn't she be hearing? couldn't we be hearing? couldn't you be hearing? couldn't they be hearing?  | 
Perfecto | Perfecto con V-ing | 
| couldn't I have heard? couldn't you have heard? couldn't she have heard? couldn't we have heard? couldn't you have heard? couldn't they have heard?  | couldn't I have been hearing? couldn't you have been hearing? couldn't she have been hearing? couldn't we have been hearing? couldn't you have been hearing? couldn't they have been hearing?  |