could sky
Verbo regular: sky - skied- skied

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could sky
you could sky
he could sky
we could sky
you could sky
they could sky 	I could be skying
you could be skying
he could be skying
we could be skying
you could be skying
they could be skying	I could have skied
you could have skied
he could have skied
we could have skied
you could have skied
they could have skied	I could have been skying
you could have been skying
he could have been skying
we could have been skying
you could have been skying
they could have been skying	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't sky
you couldn't sky
he couldn't sky
we couldn't sky
you couldn't sky
they couldn't sky 	I couldn't be skying
you couldn't be skying
he couldn't be skying
we couldn't be skying
you couldn't be skying
they couldn't be skying	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	I couldn't have been skying
you couldn't have been skying
he couldn't have been skying
we couldn't have been skying
you couldn't have been skying
they couldn't have been skying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I sky?
could you sky?
could he sky?
could we sky?
could you sky?
could they sky? 	could I be skying?
could you be skying?
could he be skying?
could we be skying?
could you be skying?
could they be skying? 	could I have skied?
could you have skied?
could he have skied?
could we have skied?
could you have skied?
could they have skied? 	could I have been skying?
could you have been skying?
could he have been skying?
could we have been skying?
could you have been skying?
could they have been skying? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I sky?
couldn't you sky?
couldn't he sky?
couldn't we sky?
couldn't you sky?
couldn't they sky? 	couldn't I be skying?
couldn't you be skying?
couldn't he be skying?
couldn't we be skying?
couldn't you be skying?
couldn't they be skying? 	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? 	couldn't I have been skying?
couldn't you have been skying?
couldn't he have been skying?
couldn't we have been skying?
couldn't you have been skying?
couldn't they have been skying?