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