could skate
Regular verb: skate - skated- skated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could skate
you could skate
she could skate
we could skate
you could skate
they could skate 	I could be skating
you could be skating
she could be skating
we could be skating
you could be skating
they could be skating	I could have skated
you could have skated
she 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
she could have been skating
we could have been skating
you could have been skating
they could have been skating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't skate
you couldn't skate
she 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
she 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
she 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
she couldn't have been skating
we couldn't have been skating
you couldn't have been skating
they couldn't have been skating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I skate?
could you skate?
could she skate?
could we skate?
could you skate?
could they skate? 	could I be skating?
could you be skating?
could she be skating?
could we be skating?
could you be skating?
could they be skating? 	could I have skated?
could you have skated?
could she 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 she have been skating?
could we have been skating?
could you have been skating?
could they have been skating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I skate?
couldn't you skate?
couldn't she 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 she 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 she 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 she have been skating?
couldn't we have been skating?
couldn't you have been skating?
couldn't they have been skating?