I could nibble you could nibble he could nibble we could nibble you could nibble they could nibble
Forma com V-ing
I could be nibbling you could be nibbling he could be nibbling we could be nibbling you could be nibbling they could be nibbling
Perfeito
I could have nibbled you could have nibbled he could have nibbled we could have nibbled you could have nibbled they could have nibbled
Perfeito com V-ing
I could have been nibbling you could have been nibbling he could have been nibbling we could have been nibbling you could have been nibbling they could have been nibbling
Negação
Forma simple
I couldn't nibble you couldn't nibble he couldn't nibble we couldn't nibble you couldn't nibble they couldn't nibble
Forma com V-ing
I couldn't be nibbling you couldn't be nibbling he couldn't be nibbling we couldn't be nibbling you couldn't be nibbling they couldn't be nibbling
Perfeito
I couldn't have nibbled you couldn't have nibbled he couldn't have nibbled we couldn't have nibbled you couldn't have nibbled they couldn't have nibbled
Perfeito com V-ing
I couldn't have been nibbling you couldn't have been nibbling he couldn't have been nibbling we couldn't have been nibbling you couldn't have been nibbling they couldn't have been nibbling
Forma interrogativa
Forma simple
could I nibble? could you nibble? could he nibble? could we nibble? could you nibble? could they nibble?
Forma com V-ing
could I be nibbling? could you be nibbling? could he be nibbling? could we be nibbling? could you be nibbling? could they be nibbling?
Perfeito
could I have nibbled? could you have nibbled? could he have nibbled? could we have nibbled? could you have nibbled? could they have nibbled?
Perfeito com V-ing
could I have been nibbling? could you have been nibbling? could he have been nibbling? could we have been nibbling? could you have been nibbling? could they have been nibbling?
Forma interro-Negação
Forma simple
couldn't I nibble? couldn't you nibble? couldn't he nibble? couldn't we nibble? couldn't you nibble? couldn't they nibble?
Forma com V-ing
couldn't I be nibbling? couldn't you be nibbling? couldn't he be nibbling? couldn't we be nibbling? couldn't you be nibbling? couldn't they be nibbling?
Perfeito
couldn't I have nibbled? couldn't you have nibbled? couldn't he have nibbled? couldn't we have nibbled? couldn't you have nibbled? couldn't they have nibbled?
Perfeito com V-ing
couldn't I have been nibbling? couldn't you have been nibbling? couldn't he have been nibbling? couldn't we have been nibbling? couldn't you have been nibbling? couldn't they have been nibbling?