I could ski you could ski he could ski we could ski you could ski they could ski
Forma com V-ing
I could be skiing you could be skiing he could be skiing we could be skiing you could be skiing they could be skiing
Perfeito
I could have skied you could have skied he could have skied we could have skied you could have skied they could have skied
Perfeito com V-ing
I could have been skiing you could have been skiing he could have been skiing we could have been skiing you could have been skiing they could have been skiing
Negação
Forma simple
I couldn't ski you couldn't ski he couldn't ski we couldn't ski you couldn't ski they couldn't ski
Forma com V-ing
I couldn't be skiing you couldn't be skiing he couldn't be skiing we couldn't be skiing you couldn't be skiing they couldn't be skiing
Perfeito
I couldn't have skied you couldn't have skied he couldn't have skied we couldn't have skied you couldn't have skied they couldn't have skied
Perfeito com V-ing
I couldn't have been skiing you couldn't have been skiing he couldn't have been skiing we couldn't have been skiing you couldn't have been skiing they couldn't have been skiing
Forma interrogativa
Forma simple
could I ski? could you ski? could he ski? could we ski? could you ski? could they ski?
Forma com V-ing
could I be skiing? could you be skiing? could he be skiing? could we be skiing? could you be skiing? could they be skiing?
Perfeito
could I have skied? could you have skied? could he have skied? could we have skied? could you have skied? could they have skied?
Perfeito com V-ing
could I have been skiing? could you have been skiing? could he have been skiing? could we have been skiing? could you have been skiing? could they have been skiing?
Forma interro-Negação
Forma simple
couldn't I ski? couldn't you ski? couldn't he ski? couldn't we ski? couldn't you ski? couldn't they ski?
Forma com V-ing
couldn't I be skiing? couldn't you be skiing? couldn't he be skiing? couldn't we be skiing? couldn't you be skiing? couldn't they be skiing?
Perfeito
couldn't I have skied? couldn't you have skied? couldn't he have skied? couldn't we have skied? couldn't you have skied? couldn't they have skied?
Perfeito com V-ing
couldn't I have been skiing? couldn't you have been skiing? couldn't he have been skiing? couldn't we have been skiing? couldn't you have been skiing? couldn't they have been skiing?