I could burrow you could burrow she could burrow we could burrow you could burrow they could burrow
Forma con V-ing
I could be burrowing you could be burrowing she could be burrowing we could be burrowing you could be burrowing they could be burrowing
Perfecto
I could have burrowed you could have burrowed she could have burrowed we could have burrowed you could have burrowed they could have burrowed
Perfecto con V-ing
I could have been burrowing you could have been burrowing she could have been burrowing we could have been burrowing you could have been burrowing they could have been burrowing
Negación
Forma simple
I couldn't burrow you couldn't burrow she couldn't burrow we couldn't burrow you couldn't burrow they couldn't burrow
Forma con V-ing
I couldn't be burrowing you couldn't be burrowing she couldn't be burrowing we couldn't be burrowing you couldn't be burrowing they couldn't be burrowing
Perfecto
I couldn't have burrowed you couldn't have burrowed she couldn't have burrowed we couldn't have burrowed you couldn't have burrowed they couldn't have burrowed
Perfecto con V-ing
I couldn't have been burrowing you couldn't have been burrowing she couldn't have been burrowing we couldn't have been burrowing you couldn't have been burrowing they couldn't have been burrowing
Forma interrogativa
Forma simple
could I burrow? could you burrow? could she burrow? could we burrow? could you burrow? could they burrow?
Forma con V-ing
could I be burrowing? could you be burrowing? could she be burrowing? could we be burrowing? could you be burrowing? could they be burrowing?
Perfecto
could I have burrowed? could you have burrowed? could she have burrowed? could we have burrowed? could you have burrowed? could they have burrowed?
Perfecto con V-ing
could I have been burrowing? could you have been burrowing? could she have been burrowing? could we have been burrowing? could you have been burrowing? could they have been burrowing?
Forma interro-negativa
Forma simple
couldn't I burrow? couldn't you burrow? couldn't she burrow? couldn't we burrow? couldn't you burrow? couldn't they burrow?
Forma con V-ing
couldn't I be burrowing? couldn't you be burrowing? couldn't she be burrowing? couldn't we be burrowing? couldn't you be burrowing? couldn't they be burrowing?
Perfecto
couldn't I have burrowed? couldn't you have burrowed? couldn't she have burrowed? couldn't we have burrowed? couldn't you have burrowed? couldn't they have burrowed?
Perfecto con V-ing
couldn't I have been burrowing? couldn't you have been burrowing? couldn't she have been burrowing? couldn't we have been burrowing? couldn't you have been burrowing? couldn't they have been burrowing?