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