could skate
Verbo regular: skate - skated- skated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could skate
you could skate
he could skate
we could skate
you could skate
they could skate 	I could be skating
you could be skating
he could be skating
we could be skating
you could be skating
they could be skating	I could have skated
you could have skated
he could have skated
we could have skated
you could have skated
they could have skated	I could have been skating
you could have been skating
he could have been skating
we could have been skating
you could have been skating
they could have been skating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't skate
you couldn't skate
he couldn't skate
we couldn't skate
you couldn't skate
they couldn't skate 	I couldn't be skating
you couldn't be skating
he couldn't be skating
we couldn't be skating
you couldn't be skating
they couldn't be skating	I couldn't have skated
you couldn't have skated
he couldn't have skated
we couldn't have skated
you couldn't have skated
they couldn't have skated	I couldn't have been skating
you couldn't have been skating
he couldn't have been skating
we couldn't have been skating
you couldn't have been skating
they couldn't have been skating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I skate?
could you skate?
could he skate?
could we skate?
could you skate?
could they skate? 	could I be skating?
could you be skating?
could he be skating?
could we be skating?
could you be skating?
could they be skating? 	could I have skated?
could you have skated?
could he have skated?
could we have skated?
could you have skated?
could they have skated? 	could I have been skating?
could you have been skating?
could he have been skating?
could we have been skating?
could you have been skating?
could they have been skating? 	

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