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